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Magnetic Systems: Publications

Work on Magnetic Systems, including low-dimensional and frustrated magnetic materials, and topological insulators.

2017


Signatures of the Kondo effect in VSe2, S. Barua, M. C. Hatnean, M. R. Lees, and G. Balakrishnan, Scientific Reports 7, 10964 (2017).

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Suppression of magnetic excitations near the surface of the topological Kondo insulator SmB6, P. K. Biswas, M. Legner, G. Balakrishnan, M. C. Hatnean, M. R. Lees, D. M. Paul, E. Pomjakushina, T. Prokscha, A. Suter, T. Neupert, and Z. Salman, Physical Review B 95, 020410(R) (2017).

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Probing the interplay between surface and bulk states in the topological Kondo insulator SmB6 through conductance fluctuation spectroscopy, S. Biswas, M. C. Hatnean, G. Balakrishnan, and A. Bid, Physical Review B 95, 205403 (2017).

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Adiabatic physics of an exchange-coupled spin-dimer system: magnetocaloric effect, zero-point fluctuations, and possible two-dimensional universal behavior, J. Brambleby, P. A. Goddard, J. Singleton, M. Jaime, T. Lancaster, L. Huang, J. Wosnitza, C. V. Topping, K. E. Carreiro, H. E. Tran, Z. E. Manson, and J. L. Manson, Physical Review B 95, 024404 (2017).

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Combining microscopic and macroscopic probes to untangle the single-ion anisotropy and exchange energies in an S = 1 quantum antiferromagnet, J. Brambleby, J. L. Manson, P. A. Goddard, M. B. Stone, R. D. Johnson, P. Manuel, J. A. Villa, C. M. Brown, H. Lu, S. Chikara, V. Zapf, S. H. Lapidus, R. Scatena, P. Macchi, Y.-S. Chen, L.-C. Wu, and J. Singleton, Physical Review B 95, 134435 (2017).

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Field-induced magnetic states in holmium tetraboride, D. Brunt, G. Balakrishnan, A. R. Wildes, B. Ouladdiaf, N. Qureshi, and O. A. Petrenko, Physical Review B 95, 024410 (2017).

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Synthesis and magnetic characterisation of Fe1-xMgxSb2O4 (x = 0.25, 0.50, 0.75) and their oxygen-excess derivatives, Fe1-xMgxSb2O4+y, B. P. de Laune, M. J. Whitaker, J. F. Marco, M. F. Thomas, F. J. Berry, M. R. Lees, and C. Greaves, Journal of Materials Chemistry C 5, 4985 (2017).

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Magnetic zeolites: novel nanoreactors through radiofrequency heating, J. Garcia-Aguilar, J. Fernandez-Garcia, E. V. Rebrov, M. R. Lees, P. Z. Gao, D. Cazorla-Amoros, and A. Berenguer-Murcia, Chemical Communications 53, 4262 (2017).

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Single crystal growth, structure and magnetic properties of Pr2Hf2O7 pyrochlore, M. C. Hatnean, R. Sibille, M. R. Lees, M. Kenzelmann, V. Ban, V. Pomjakushin, and G. Balakrishnan, Journal of Physics - Condensed Matter 29, 075902 (2017).

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Terahertz Spectra Revealing the Collective Excitation Mode in Charge-Density-Wave Single Crystal LuFe2O4, X. Liu, Z. Jin, Z. Cheng, X. Lin, G. Balakrishnan, G. Ma, Physica Status Solidi (RRL) – Rapid Research Letters 11, 1700177 (2017).

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The enhancement of direct amide synthesis reaction rate over TiO2@SiO2@NiFe2O4 magnetic catalysts in the continuous flow under radiofrequency heating, Y. W. Liu, N. Cherkasov, P. Z. Gao, J. Fernandez, M. R. Lees, and E. V. Rebrov, Journal of Catalysis 355 , 120 (2017).

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Colossal terahertz magnetoresistance at room temperature in epitaxial La0.7Sr0.3MnO3 nanocomposites and single-phase thin films, J. Lloyd-Hughes, C. D. W. Mosley, S. P. P. Jones, M. R. Lees, A. Chen, Q. X. Jia, E. M. Choi, and J. L. MacManus-Driscoll, Nano Letters 17, 2506 (2017).

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Disorder and Quantum Spin Ice, N. Martin, P. Bonville, E. Lhotel, S. Guitteny, A. Wildes, C. Decorse, M. Ciomaga Hatnean, G. Balakrishnan, I. Mirebeau, and S. Petit, Physical Review X 7, 041028 (2017).

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Atomic structure study of the pyrochlore Yb2Ti2O7 and its relationship with low-temperature magnetic order, A. Mostaed, G. Balakrishnan, M. R. Lees, Y. Yasui, L.-J. Chang, and R. Beanland, Physical Review B 95, 094431 (2017).

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Critical behavior study of the spin ordering transition in RVO3 (R = Ce, Pr, Nd, Sm, Gd, Er) by means of ac photopyroelectric calorimetry, A. Oleaga, V. Shvalya, V. Liubachko, G. Balakrishnan, L. D. Tung, and A. Salazar, Journal of Alloys and Compounds 703, 210 (2017).

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Spin correlations in the dipolar pyrochlore antiferromagnet Gd2Sn2O7, J. A. M. Paddison, G. Ehlers, O. A. Petrenko, A. R. Wildes, J. S. Gardner, and J. R. Stewart, Journal of Physics-Condensed Matter 29, 144001 (2017).

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Rare-earth/transition-metal magnetic interactions in pristine and (Ni,Fe)-doped YCo5 and GdCo5, C. E. Patrick, S. Kumar, G. Balakrishnan, R. S. Edwards, M. R. Lees, E. Mendive-Tapia, L. Petit, and J. B. Staunton, Physical Review Materials 1, 024411 (2017).

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Magnetic excitations in the ground state of Yb2Ti2O7, V. Peçanha-Antonio, E. Feng, Y. Su, V. Pomjakushin, F. Demmel, L.-J. Chang, R. J. Aldus, Y. Xiao, M. R. Lees, T. Brückel, Physical Review B 95, 214415 (2017).

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Evolution of spin correlations in SrDy2O4 in an applied magnetic field, O. A. Petrenko, O. Young, D. Brunt, G. Balakrishnan, P. Manuel, D. D. Khalyavin, and C. Ritter, Physical Review B 96, 104442 (2017).

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Electric field controlled magnetization and charge-ordering in Pr0.6Ca0.4MnO3, H. Sharma, M. R. Lees, G. Balakrishnan, D. M. Paul, A. Tulapurkar, and C. V. Tomy, Materials Chemistry and Physics 194, 142 (2017).

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Coulomb spin liquid in anion-disordered pyrochlore Tb2Hf2O7, R. Sibille, E. Lhotel, M. Ciomaga Hatnean, G. J. Nilsen, G. Ehlers, A. Cervellino, E. Ressouche, M. Frontzek, O. Zaharko, V. Pomjakushin, U. Stuhr, H. C. Walker, D. T. Adroja, H. Luetkens, C. Baines, A. Amato, G. Balakrishnan, T. Fennell, and M. Kenzelmann, Nature Communications, 8 892 (2017).

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Order by Quenched Disorder in the Model Triangular Antiferromagnet RbFe(MoO4)2, A. I. Smirnov, T. A. Soldatov, O. A. Petrenko, A. Takata, T. Kida, M. Hagiwara, A. Y. Shapiro, and M. E. Zhitomirsky, Physical Review Letters 119, 047204 (2017).

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Growth of YbFe2O4 single crystals exhibiting long-range charge order via the optical floating zone method, H. L. Williamson, T. Mueller, M. Angst, and G. Balakrishnan, Journal of Crystal Growth 475, 44 (2017)..

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2016


Structure and magnetism in Cr-embedded Co nanoparticles, S. H. Baker, M. S. Kurt, M. Roy, M. R. Lees, and C. Binns, Journal of Physics. Condensed Matter 28, 046003 (2016).

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Octanuclear Heterobimetallic Ni(4)Ln(4) Assemblies Possessing Ln(4) Square Grid 2 x 2 Motifs: Synthesis, Structure, and Magnetism, S. Biswas, J. Goura, S. Das, C. V. Topping, J. Brambleby, P. A. Goddard, and V. Chandrasekhar, Inorganic Chemistry 55, 8422 (2016).

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Magnetic properties and crystal field in PrZr2O7, P. Bonville, S. Guitteny, A. Gukasov, I. Mirebeau, S. Petit, C. Decorse, M. C. Hatnean, and G. Balakrishnan, Physical Review B 94, 134428 (2016).

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Experimental and theoretical electron density analysis of copper pyrazine nitrate quasi-low-dimensional quantum magnets, L. H. R. Dos Santos, A. Lanza, A. M. Barton, J. Brambleby, W. J. A. Blackmore, P. A. Goddard, F. Xiao, R. C. Williams, T. Lancaster, F. L. Pratt, S. J. Blundell, J. Singleton, J. L. Manson, and P. Macchi, Journal of the American Chemical Society 138, 2280 (2016).

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Control of the third dimension in copper-based square-lattice antiferromagnets, P. A. Goddard, J. Singleton, I. Franke, J. S. Möller, T. Lancaster, A. J. Steele, C. V. Topping, S. J. Blundell, F. L. Pratt, C. Baines, J. Bendix, R. D. McDonald, J. Brambleby, M. R. Lees, S. H. Lapidus, P. W. Stephens, B. W. Twamley, M. M. Conner, K. Funk, J. F. Corbey, H. E. Tran, J. A. Schlueter, and J. L. Manson, Physical Review B 93, 094430 (2016).

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Physical Review B: Editors' Suggestion

Heterometallic trinuclear {Co(2)(III)Ln(III)} (Ln = Gd, Tb, Ho and Er) complexes in a bent geometry. Field-induced single-ion magnetic behavior of the Er-III and Tb-III analogues, J. Goura, J. Brambleby, C. V. Topping, P. A. Goddard, R. S. Narayanan, A. K. Bar, and V. Chandrasekhar, Dalton Transactions 45, 9235 (2016).

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Zirconate Pyrochlore Frustrated Magnets: Crystal Growth by the Floating Zone Technique, M. C. Hatnean, C. Decorse, M. R. Lees, O. A. Petrenko, and G. Balakrishnan, Crystals 6, 79 (2016).

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Ba4Ru3O10.2(OH)1.8: a new member of the layered hexagonal perovskite family crystallised from water, C. I. Hiley, M. R. Lees, D. L. Hammond, R. J. Kashtiban, J. Sloan, R. I. Smith, and R. I. Walton, Chemical Communications 52, 6375 (2016).

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Probing beneath the surface without a scratch — Bulk non-destructive elemental analysis using negative muons, A. D. Hillier, D. M. Paul, and K. Ishida, Microchemical Journal 125, 203 (2016).

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Fermi-surface topologies and low-temperature phases of the filled skutterudite compounds CeO4Sb12 and NdOs4Sb12, P. C. Ho, J. Singleton, P. A. Goddard, F. F. Balakirev, S. Chikara, T. Yanagisawa, M. B. Maple, D. B. Shrekenhamer, X. Lee, and A. T. Thomas, Physical Review B 94, 205140 (2016).

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Antiferromagnetism in a Family of S = 1 Square Lattice Coordination Polymers NiX2(pyz)2 (X = Cl, Br, I, NCS; pyz = Pyrazine), J. Liu, P. A. Goddard, J. Singleton, J. Brambleby, F. Foronda, J. S. Möller, Y. Kohama, S. Ghannadzadeh, A. Ardavan, S. J. Blundell, T. Lancaster, F. Xiao, R. C. Williams, F. L. Pratt, P. J. Baker, K. Wierschem, S. H. Lapidus, K. H. Stone, P. W. Stephens, J. Bendix, T. J. Woods, K. E. Carreiro, H. E. Tran, C. J. Villa, and J. L. Manson, Inorganic Chemistry 55, 3515 (2016).

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Bimetallic MOFs (H3O)(x) Cu(MF6)(pyrazine)2(4-x)H2O (M = V4+, x = 0; M = Ga3+ , x = 1): co-existence of ordered and disordered quantum spins in the V4+ system, J. L. Manson, J. A. Schlueter, K. E. Garrett, P. A. Goddard, T. Lancaster, J. S. Moller, S. J. Blundell, A. J. Steele, I. Franke, F. L. Pratt, J. Singleton, J. Bendix, S. H. Lapidus, M. Uhlarz, O. Ayala-Valenzuela, R. D. McDonald, M. Gurak, and C. Baines, Chemical Communications 52, 12653 (2016).

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Bulk crystal growth and surface preparation of NiSb, MnSb, and NiMnSb, I. Maskery, C. Burrows, M. Walker, R. P. Singh, G. Balakrishnan, J. A. Duffy, and G. R. Bell, Journal of Vacuum Science & Technology B 34, 041219 (2016).

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Critical behavior study of Pr1−xSrxMnO3 and Nd1−xSrxMnO3 with x = 1/2, A. Oleaga, A. Salazar, M. C. Hatnean, and G. Balakrishnan, Journal of Alloys and Compounds 682, 825 (2016).

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Robust singlet dimers with fragile ordering in two-dimensional honeycomb lattice of Li2RuO3, J. Park, T.-Y. Tan, D. T. Adroja, A. Daoud-Aladine, S. Choi, D.-Y. Cho, S.-H. Lee, J. Kim, H. Sim, T. Morioka, H. Nojiri, V. V. Krishnamurthy, P. Manuel, M. R. Lees, S. V. Streltsov, D. I. Khomskii, and J.-G. Park, Scientific Reports 6, 25238 (2016).

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Experimental signature of the attractive Coulomb force between positive and negative magnetic monopoles in spin ice, C. Paulsen, S. R. Giblin, E. Lhotel, D. Prabhakaran, G. Balakrishnan, K. Matsuhira, and S. T. Bramwell, Nature Physics 12, 661 (2016).

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Observation of magnetic fragmentation in spin ice, S. Petit, E. Lhotel, B. Canals, M. Ciomaga Hatnean, J. Ollivier, H. Mutka, E. Ressouche, A. R. Wildes, M. R. Lees, and G. Balakrishnan, Nature Physics 12, 746 (2016).

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Antiferroquadrupolar correlations in the quantum spin ice candidate Pr2Zr2O7, S. Petit, E. Lhotel, S. Guitteny, O. Florea, J. Robert, P. Bonville, I. Mirebeau, J. Ollivier, H. Mutka, E. Ressouche, C. Decorse, M. C. Hatnean, and G. Balakrishnan, Physical Review B 94, 165153 (2016).

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Candidate quantum spin ice in the pyrochlore Pr2Hf2O7, R. Sibille, E. Lhotel, M. C. Hatnean, G. Balakrishnan, B. Fak, N. Gauthier, T. Fennell, and M. Kenzelmann, Physical Review B 94, 024436 (2016).

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Magnetic properties of Sr3NiIrO6 and Sr3CoIrO6: Magnetic hysteresis with coercive fields of up to 55 T, J. Singleton, J. W. Kim, C. V. Topping, A. Hansen, E.-D. Mun, S. Chikara, I. Lakis, S. Ghannadzadeh, P. Goddard, X. Luo, Y. S. Oh, S.-W. Cheong, and V. S. Zapf, Physical Review B 94, 224408 (2016).

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Heparin-stabilised iron oxide for MR applications: a relaxometric study, L. Ternent, D. A. Mayoh, M. R. Lees, and G.-L. Davies, Journal of Materials Chemistry B 4, 3065 (2016).

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2015

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Anomalies of a topologically ordered surface, D. Biswas, S. Thakur, K. Ali, G. Balakrishnan, and K. Maiti, Scientific Reports 5, 10260 (2015).

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Exceptional surface and bulk electronic structures in a topological insulator, Bi2Se3, D. Biswas, S. Thakur, G. Balakrishnan, and K. Maiti, Scientific Reports 5, 17351 (2015).

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Robust local and nonlocal transport in the topological Kondo insulator SmB6 in the presence of a high magnetic field, S. Biswas, R. Nagarajan, S. Sarkar, K. R. Amin, M. C. Hatnean, S. Tewari, G. Balakrishnan, and A. Bid, Physical Review B 92, 085103 (2015).

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Magnetic ground state of the two isostructual polymeric quantum magnets [Cu(HF2)(pyrazine)2]SbF6 and [Co(HF2)(pyrazine)2]SbF6 investigated with neutron powder diffraction, J. Brambleby, P. A. Goddard, R. D. Johnson, J. Liu, D. Kaminski, A. Ardavan, A. J. Steele, S. J. Blundell, T. Lancaster, P. Manuel, P. J. Baker, J. Singleton, S. G. Schwalbe, P. M. Spurgeon, H. E. Tran, P. K. Peterson, J. F. Corbey, and J. L. Manson, Physical Review B 92, 134406 (2015).

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Quality Heterostructures from Two-Dimensional Crystals Unstable in Air by Their Assembly in Inert Atmosphere, Y. Cao, A. Mishchenko, G. L. Yu, E. Khestanova, A. P. Rooney, E. Prestat, A. V. Kretinin, P. Blake, M. B. Shalom, C. Woods, J. Chapman, G. Balakrishnan, I. V. Grigorieva, K. S. Novoselov, B. A. Piot, M. Potemski, K. Watanabe, T. Taniguchi, S. J. Haigh, A. K. Geim, and R. V. Gorbachev, Nano Letters 15, 4914 (2015).

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Effects of rare-earth size on the electronic structure of La1-xLuxVO3, B. Chen, J. Laverock, D. Newby, Jr., J. F. McNulty, K. E. Smith, P. A. Glans, J. H. Guo, R. M. Qiao, W. L. Yang, M. R. Lees, L. D. Tung, R. P. Singh, and G. Balakrishnan, Journal of Physics - Condensed Matter 27, 105503 (2015).

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Dispersionless Spin Waves and Underlying Field-Induced Magnetic Order in Gadolinium Gallium Garnet, N. d’Ambrumenil, O. A. Petrenko, H. Mutka, and P. P. Deen, Physical Review Letters 114, 227203 (2015).

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Structural, optical and vibrational properties of self-assembled Pbn+1(Ti1-xFex)nO3n+1 Ruddlesden-Popper superstructures, K. I. Doig, J. J. P. Peters, S. Nawaz, D. Walker, M. Walker, M. R. Lees, R. Beanland, A. M. Sanchez, C. F. McConville, V. R. Palkar, and J. Lloyd-Hughes, Scientific Reports 5, 7719 (2015).

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An in-vitro model of mesenchymal stem cell targeting using magnetic particle labelling, A. J. El Haj, J. R. Glossop, H. S. Sura, M. R. Lees, B. Hu, S. Wolbank, M. van Griensven, H. Redl, and J. Dobson, Journal of Tissue Engineering and Regenerative Medicine 9, 724 (2015).

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Magnetic excitation spectrum of LuFe2O4 measured with inelastic neutron scattering, S. M. Gaw, H. J. Lewtas, D. F. McMorrow, J. Kulda, R. A. Ewings, T. G. Perring, R. A. McKinnon, G. Balakrishnan, D. Prabhakaran, and A. T. Boothroyd, Physical Review B 91, 035103 (2015).

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Growth of single-crystals of rare-earth zirconate pyrochlores, Ln2Zr2O7 (with Ln = La, Nd, Sm, and Gd) by the floating zone technique, M. Ciomaga Hatnean, M. R. Lees, and G. Balakrishnan, Journal of Crystal Growth 418, 1 (2015).

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Structural and magnetic investigations of single-crystalline neodymium zirconate pyrochlore Nd2Zr2O7, M. Ciomaga Hatnean, M. R. Lees, O. A. Petrenko, D. S. Keeble, G. Balakrishnan, M. J. Gutmann, V. V. Klekovkina, and B. Z. Malkin, Physical Review B 91, 174416 (2015).

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Antiferromagnetism at T > 500 K in the layered hexagonal ruthenate SrRu2O6, C. I. Hiley, D. O. Scanlon, A. A. Sokol, S. M. Woodley, A. M. Ganose, S. Sangiao, J. M. De Teresa, P. Manuel, D. D. Khalyavin, M. Walker, M. R. Lees, and R. I. Walton, Physical Review B 92, 104413 (2015).

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Transverse field muon-spin rotation signature of the skyrmion-lattice phase in Cu2OSeO3, T. Lancaster, R. C. Williams, I. O. Thomas, F. Xiao, F. L. Pratt, S. J. Blundell, J. C. Loudon, T. Hesjedal, S. J. Clark, P. D. Hatton, M. Ciomaga Hatnean, D. S. Keeble, and G. Balakrishnan, Physical Review B 91, 224408 (2015).

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Enhanced electron correlations at the SrxCa1-xVO3 surface, J. Laverock, J. Kuyyalil, B. Chen, R. P. Singh, B. Karlin, J. C. Woicik, G. Balakrishnan, and K. E. Smith, Physical Review B 91, 165123 (2015).

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Fluctuations and All-In All-Out Ordering in Dipole-Octupole Nd2Zr2O7, E. Lhotel, S. Petit, S. Guitteny, O. Florea, M. Ciomaga Hatnean, C. Colin, E. Ressouche, M. R. Lees, and G. Balakrishnan, Physical Review Letters 115, 197202 (2015).

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Iron and Manganese Complexes of 2-Carbonyl Pyrrolyls: Scorpionate Sandwich Anions and Extended Structures, L. Li, G. J. Clarkson, M. R. Lees, S. E. Howson, S.-Y. Tan, S. S. Turner, and P. Scott, Organometallics 34, 2543 (2015).

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Magnetic and spectral properties of the multisublattice oxides SrY2O4:Er3+ and SrEr2O4, B. Z. Malkin, S. I. Nikitin, I. E. Mumdzhi, D. G. Zverev, R. V. Yusupov, I. F. Gilmutdinov, R. Batulin, B. F. Gabbasov, A. G. Kiiamov, D. T. Adroja, O. Young, and O. A. Petrenko, Physical Review B 92, 094415 (2015).

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Three-dimensional Ising critical behavior in R0.6Sr0.4MnO3 (R = Pr, Nd) manganites, A. Oleaga, A. Salazar, M. Ciomaga Hantean, and G. Balakrishnan, Physical Review B 92, 024409 (2015).

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Hidden order in spin-liquid Gd3Ga5O12, J. A. M. Paddison, H. Jacobsen, O. A. Petrenko, M. T. Fernández-Díaz, P. P. Deen, and A. L. Goodwin, Science 350, 179 (2015).

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Magnetic field driven 2D-3D crossover in the S = 1/2 frustrated chain magnet LiCuVO4, L. A. Prozorova, S. S. Sosin, L. E. Svistov, N. Büttgen, J. B. Kemper, A. P. Reyes, S. Riggs, A. Prokofiev, and O. A. Petrenko, Physical Review B 91, 174410 (2015).

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Nanomaterials of the Topological Crystalline Insulators, Pb1-xSnxTe and Pb1-xSnxSe, M. Saghir, A. M. Sanchez, S. A. Hindmarsh, S. J. York, and G. Balakrishnan, Crystal Growth and Design 15, 5202 (2015).

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Raman spectroscopic studies of CuFeO2 at high pressures, N. P. Salke, K. Kamali, T. R. Ravindran, G. Balakrishnan, and R. Rao, Vibrational Spectroscopy 81, 112 (2015).

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Evidence for a hybridization gap in noncentrosymmetric CeRuSi3, M. Smidman, D. T. Adroja, E. A. Goremychkin, M. R. Lees, D. M. Paul, and G. Balakrishnan, Physical Review B 91, 064419 (2015).

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Unconventional Fermi surface in an insulating state, B. S. Tan, Y.-T. Hsu, B. Zeng, M. C. Hatnean, N. Harrison, Z. Zhu, M. Hartstein, M. Kiourlappou, A. Srivastava, M. D. Johannes, T. P. Murphy, J.-H. Park, L. Balicas, G. G. Lonzarich, G. Balakrishnan, and S. E. Sebastian, Science 349, 287 (2015).

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2014

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Exchange interactions in Ca3Co2O6 probed locally by NMR, G. Allodi, P. Santini, S. Carretta, S. Agrestini, C. Mazzoli, A. Bombardi, M. R. Lees, and R. De Renzi, Physical Review B 89, 104401 (2014).

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Low-temperature magnetic fluctuations in the Kondo insulator SmB6, P. K. Biswas, Z. Salman, T. Neupert, E. Morenzoni, E. Pomjakushina, F. von Rohr, K. Conder, G. Balakrishnan, M. Ciomaga Hatnean, M. R. Lees, D. McK. Paul, A. Schilling, C. Baines, H. Luetkens, R. Khasanov, and A. Amato, Physical Review B 89, 161107(R) (2014).

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Synthesis, structure and magnetism of the mixed-valent phosphonate phosphonate cage, Mn(II)Mn(III)12(mu4-O)6(mu-OH)6(O3P-t-Bu)10(OH2)2(DMF)4][2MeOH.4DMF], V. Chandrasekhar, J. Goura, K. Gopal, J. Liu, and P. Goddard, Polyhedron 72, 35 (2014).

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Structural and magnetic properties of single-crystals of the geometrically frustrated zirconium pyrochlore, Pr2Zr2O7, M. C. Hatnean, C. Decorse, M. R. Lees, O. A. Petrenko, D. S. Keeble, and G. Balakrishnan, Materials Research Express 1, 026109 (2014).

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Static magnetic moments revealed by muon spin relaxation and thermodynamic measurements in the quantum spin ice Yb2Ti2O7, L.-J. Chang, M. R. Lees, I. Watanabe, A. D. Hillier, Y. Yasui, and S. Onoda, Physical Review B 89, 184416 (2014).

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Ultrasonic investigations of the spin ices Dy2Ti2O7 and Ho2Ti2O7 in and out of equilibrium, S. Erfanifam, S. Zherlitsyn, S. Yasin, Y. Skourski, J. Wosnitza, A. A. Zvyagin, P. McClarty, R. Moessner, G. Balakrishnan, and O. A. Petrenko, Physical Review B 90, 064409 (2014).

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Crystal growth and characterization of the non-centrosymmetric antiferromagnet Ba2CuGe2O7, R. Fittipaldi, L. Rocco, M. C. Hatnean, V. Granata, M. R. Lees, G. Balakrishnan, and A. Vecchione, Journal of Crystal Growth 404, 223 (2014).

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A Direct Three-Component Reaction for the Isolation of a Nonanuclear Iron(III) Phosphonate, J. Goura, J. J. Liu, P. Goddard, and V. Chandrasekhar, European Journal of Inorganic Chemistry 2014, 4342 (2014).

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Ruthenium(V) Oxides from Low-Temperature Hydrothermal Synthesis, C. I. Hiley, M. R. Lees, J. M. Fisher, D. Thompsett, S. Agrestini, R. I. Smith, and R. I. Walton, Angewandte Chemie Int. Ed. 53, 4423 (2014).

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Controlling Magnetic Order and Quantum Disorder in Molecule-Based Magnets, T. Lancaster, P. A. Goddard, S. J. Blundell, F. R. Foronda, S. Ghannadzadeh, J. S. Möller, P. J. Baker, F. L. Pratt, C. Baines, L. Huang, J. Wosnitza, R. D. McDonald, K. A. Modic, J. Singleton, C. V. Topping, T. A. W. Beale, F. Xiao, J. A. Schlueter, A. M. Barton, R. D. Cabrera, K. E. Carreiro, H. E. Tran, and J. L. Manson, Physical Review Letters 112, 207201 (2014).

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Giant frictional dissipation peaks and charge-density-wave slips at the NbSe2 surface, M. Langer, M. Kisiel, R. Pawlak, F. Pellegrini, G. E. Santoro, R. Buzio, A. Gerbi, G. Balakrishnan, A. Baratoff, E. Tosatti, and E. Meyer, Nature Materials 13, 173 (2014).

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Low-energy V t(2g) orbital excitations in NdVO3, J. Laverock, B. Chen, A. R. H. Preston, D. Newby, L. F. J. Piper, L. D. Tung, G. Balakrishnan, P. A. Glans, J. H. Guo, and K. E. Smith, Journal of Physics: Condensed Matter 26, 455603 (2014).

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First-order magnetic transition in Yb2Ti2O7, E. Lhotel, S. R. Giblin, M. R. Lees, G. Balakrishnan, L. J. Chang, and Y. Yasui, Physical Review B 89, 224419 (2014).

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On the path to bulk FeH2: Synthesis and magnetic properties of amorphous iron (II) hydride, L. Morris, M. L. Trudeau, M. R. Lees, J. V. Hanna, D. and M. Antonelli, Journal of Alloys and Compounds 590, 199 (2014).

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Infrared phonon spectrum of the tetragonal helimagnet Ba2CuGe2O7, A. Nucara, W. S. Mohamed, L. Baldassarre, S. Koval, J. Lorenzana, R. Fittipaldi, G. Balakrishnan, A. Vecchione, and P. Calvani, Physical Review B 90, 014304 (2014).

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Magnetic susceptibility and heat capacity measurements of single crystal TbMnO3, D. O’Flynn, M. R. Lees, and G. Balakrishnan, Journal of Physics: Condensed Matter 26, 256002 (2014).

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Spin correlations in Ca3Co2O6 : Polarized-neutron diffraction and Monte Carlo study, J. A. M. Paddison, S. Agrestini, M. R. Lees, C. L. Fleck, P. P. Deen, A. L. Goodwin, J. R. Stewart, and O. A. Petrenko, Physical Review B 90, 014411 (2014).

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Oxide heterostructures: Thin spin ice under investigation, O. Petrenko, Nature Materials 13, 430 (2014).

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Low-temperature magnetism in the honeycomb systems SrLn2O4, O. A. Petrenko, Low Temperature Physics 40, 106 (2014).

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Synthesis and characterization of nanomaterials of the Topological Crystalline Insulator SnTe, M. Saghir, M. R. Lees, S. J. York, and G. Balakrishnan, Crystal Growth & Design 14, 2009 (2014).

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Electrical transport properties of CaB6, J. Stankiewicz, J. Sese, G. Balakrishnan, and Z. Fisk, Physical Review B 90, 155128 (2014).

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Magnetic properties of geometrically frustrated SrGd2O4, O. Young, G. Balakrishnan, M. R. Lees, and O. A. Petrenko, Physical Review B 90, 094421 (2014).

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Impact of the various spin- and orbital-ordering processes on the multiferroic properties of orthovanadate DyVO3, Q. Zhang, K. Singh, C. Simon, L. D. Tung, G. Balakrishnan, and V. Hardy, Physical Review B 90, 024418 (2014).

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2013

Quilliam et al. Laverock et al.



Electronic structure of the kagome staircase compounds Ni3V2O8 and Co3V2O8, J. Laverock, B. Chen, A. R. H. Preston, K. E. Smith, N. R. Wilson, G. Balakrishnan, P. A. Glans, and J. H. Guo, Physical Review B 87, 125133 (2013).

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Remotely triggered scaffolds for controlled release of pharmaceuticals, Paul Roach, David J. McGarvey, Martin R. Lees, and Clare Hoskins, International Journal of Molecular Sciences 14, 8585 (2013).

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Low-temperature muon spin rotation studies of the monopole charges and currents in Y doped Ho2Ti2O7, L. J. Chang, M. R. Lees, G. Balakrishnan, Y.-J. Kao, and A. D. Hillier, Scientific Reports 3, 1881 (2013).

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Physical stability, biocompatibility and potential use of hybrid iron oxide-gold nanoparticles as drug carriers, Christopher M. Barnett, Mariana Gueorguieva, Martin R. Lees, David J. McGarvey, and Clare Hoskins, Journal of Nanoparticle Research 15, 1706 (2013).

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k-resolved susceptibility function of 2H-TaSe2 from angle-resolved photoemission, J. Laverock, D. Newby, Jr., E. Abreu, R. Averitt, K. E. Smith, R. P. Singh, G. Balakrishnan, J. Adell, and T. Balasubramanian, Physical Review B 88, 035108 (2013).

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Resonant soft-X-ray emission as a bulk probe of correlated electron behavior in metallic SrxCa1-xVO3, J. Laverock, B. Chen, K. E. Smith, R. P. Singh, G. Balakrishnan, M. Gu, J.W. Lu, S. A. Wolf, R. M. Qiao, W. Yang, and J. Adell, Physical Review Letters 111, 047402 (2013).

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Juxtaposition of spin freezing and long range order in a series of geometrically frustrated antiferromagnetic gadolinium garnets, J. A. Quilliam, S. Meng, H. A. Craig, L. R. Corruccini, G. Balakrishnan, O. A. Petrenko, A. Gomez, S. W. Kycia, M. J. P. Gingras, and J. B. Kycia, Physical Review B 87, 174421(2013).

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Highly frustrated magnetism in SrHo2O4: Coexistence of two types of short-range order, O. Young, A. R. Wildes, P. Manuel, B. Ouladdiaf, D. D. Khalyavin, G. Balakrishnan, and O. A. Petrenko, Phys. Rev. B 88, 024411 (2013).

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Magnetic field-induced ordering in SrDy2O4, T. H. Cheffings, M. R. Lees, G. Balakrishnan and O. A. Petrenko, Journal of Physics: Condensed Matter 25, 256001 (2013).

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2012

King et al


Magnetism 2



Effect of the hybrid composition on the physicochemical properties and morphology of iron oxide-gold nanoparticles, C. M. Barnett, M. Gueorguieva, M. R. Lees, D. J. McGarvey, R. J. Darton, and C. Hoskins, Journal of Nanoparticle Research 14, 1170 (2012).

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Depth-dependent magnetism in epitaxial MnSb thin films: effects of surface passivation and cleaning, J. D. Aldous, C. W. Burrows, I. Maskery, M. S. Brewer, T. P. A. Hase, J. A. Duffy, M. R. Lees, C. Sanchez-Hanke, T. Decoster, W. Theis, A. Quesada, A. K. Schmid, and G. R. Bell, Journal of Physics-Condensed Matter 24, 146002 (2012).

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Low temperature magnetic structure of geometrically frustrated SrHo2O4, O. Young, L. C. Chapon, and O. A. Petrenko, Journal of Physics Conference Series 391, 012081 (2012).

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Structural phase transitions in the Ag2Nb4O11-Na2Nb4O11 solid solution, D. I. Woodward, M. R. Lees, and P. A. Thomas, Journal of Solid State Chemistry 192, 385 (2012).

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Bismuth iridium oxide oxygen evolution catalyst from hydrothermal synthesis, K. Sardar, S. C. Ball, J. D. B. Sharman, D. Thompsett, J. M. Fisher, R. A. P. Smith, P. K. Biswas, M. R. Lees, R. J. Kashtiban, J. Sloan, and R. I. Walton, Chemistry of Materials 24, 4192 (2012).

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Structural, spectroscopic, magnetic and electrical characterization of Ca-doped polycrystalline bismuth ferrite, Bi1−xCaxFeO3−x/2 (x ≤ 0.1), Kripasindhu Sardar, Jiawang Hong, Gustau Catalan, P. K. Biswas, Martin R. Lees, Richard I. Walton, James F. Scott, and Simon A. T. Redfern, Journal of Physics: Condensed Matter 24, 045904 (2012).

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Magnetisation studies of geometrically frustrated antiferromagnets SrLn2O4, with Ln = Er, Dy, and Ho, Thomas J. Hayes, Olga Young, Geetha Balakrishnan, and Oleg A. Petrenko, Journal of the Physical Society of Japan 81, 024708 (2012).

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Magnetic phases in a Gd2Ti2O7 pyrochlore for a field applied along the [100] axis, O. A. Petrenko, M. R. Lees, G. Balakrishnan, V. N. Glazkov, and S. S. Sosin, Physical Review B 85, 180412(R) (2012).

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Controlling bulk conductivity in topological insulators: key role of anti-site defects, D. O. Scanlon, P. D. C. King, R. P. Singh, A. de la Torre, S. McKeown Walker, G. Balakrishnan, Advanced Materials 24, 2154 (2012).

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Raman scattering study of delafossite magnetoelectric multiferroic compounds:CuFeO2 and CuCrO2, O. Aktas, K. D. Truong, T. Otani, G. Balakrishnan, M. J. Clouter, T. Kimura, and G. Quirion, Journal of Physics: Condensed Matter 24, 036003 (2012).

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Higgs transition from a magnetic Coulomb liquid to a ferromagnet in Yb2Ti2O7, Lieh-Jeng Chang, Shigeki Onoda, Yixi Su, Ying-Jer Kao, Ku-Ding Tsuei, Yukio Yasui, Kazuhisa Kakurai and M. R. Lees, Nature Communications 3, 992 (2012).

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Emergent quantum confinement at topological insulator surfaces, M. S. Bahramy, P. D. C. King, A. de la Torre, J. Chang, M. Shi, L. Patthey, G. Balakrishnan, Ph. Hofmann, R. Arita, N. Nagaosa, and F. Baumberger, Nature Communications 3, 1159 (2012).

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2011

Chang et al. Scanlon et al.



Large tunable Rashba spin splitting of a two-dimensional electron gas in Bi2Se3, P. D. C. King, R. C. Hatch, M. Bianchi, R. Ovsyannikov, C. Lupulescu, G. Landolt, B. Slomski, J. H. Dil, D. Guan, J. L. Mi, E. D. L. Rienks, J. Fink, A. Lindblad, S. Svensson, S. Bao, G. Balakrishnan, B. B. Iversen, J. Osterwalder, W. Eberhardt, F. Baumberger, and Ph. Hofmann, Physical Review Letters 107, 096802, (2011).

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Intrinsic and extrinsic nonstationary field-driven processes in the spin-ice compound Dy2Ti2O7, S. Erfanifam, S. Zherlitsyn, J. Wosnitza, R. Moessner, O. A. Petrenko, G. Balakrishnan, and A. A. Zvyagin Physical Review B 84, 220404 (2011).

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Isomeric Fe(II) MOFs: from a diamond-framework spin-crossover material to a 2D hard magnet, Lihong Li, Guy J. Clarkson, David J. Evans, Martin R. Lees, Scott S. Turner, and Peter Scott, Chemical Communications 47, 12646 (2011).

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Coexistence of the long-range and short-range magnetic order components in SrEr2O4, T. J. Hayes, G. Balakrishnan, P. P. Deen, P. Manuel, L. C. Chapon, and O. A. Petrenko, Physical Review B 84, 174435 (2011).

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Multiferroic properties and magnetic structure of Sm1−xYxMnO3, D. O’Flynn, C.V. Tomy, M.R. Lees, A. Daoud-Aladine, and G. Balakrishnan, Physical Review B 83, 174426 (2011).

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Slow magnetic order-order transition in the spin chain antiferromagnet Ca3Co2O6, S. Agrestini, C. L. Fleck, L. C. Chapon, C. Mazzoli, A. Bombardi, M. R. Lees, and O. A. Petrenko, Physical Review Letters 106, 197204, (2011).

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Unusual line shape of B 1s core level spectra in rare earth hexaborides, Swapnil Patil, Ganesh Adhikary, Geetha Balakrishnan, and Kalobaran Maiti, Solid State Communications 151, 326 (2011).

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Direct hydrothermal synthesis and physical properties of rare-earth and Yttrium orthochromite perovskites, Kripasindhu Sardar, Martin R. Lees, Reza J. Kashtiban, Jeremy Sloan, and Richard I. Walton, Chemistry of Materials 23, 48 (2011).

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On the growth and properties of high quality single crystals of the yttrium doped strontium cobaltates, Y1−xSrxCoO3-d (0.7 < x <0.95), C. L. Fleck, G. Balakrishnan, and M. R. Lees, Journal of Materials Chemistry 21, 1212 (2011).

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Magnetic order in geometrically frustrated Gd2(Ti1−xZrx)2O7 (x = 0.02 and 0.15) single crystals, Da-qian Liao, M. R. Lees, D. W. Baker, D. McK. Paul, and G. Balakrishnan, Physical Review B 83, 064403 (2011).

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NMR study of magnetic order, metamagnetic transitions, and low-temperature spin freezing in Ca3Co2O6, G. Allodi, R. De Renzi, S. Agrestini, C. Mazzoli, and M. R. Lees, Physical Review B 83, 104408 (2011).

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Novel magnetite-silica nanocomposite (Fe3O4-SBA-15) particles for DNA binding and gene delivery aided by a magnet array, Humphrey P. Yiu, Stuart C. McBain, Zoe A.D. Lethbridge, Martin R. Lees, Iryna Palona, Cristina I. Olariu, Jon Dobson, Journal of Nanoscience and Nanotechnology 11, 3586 (2011).

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Titanium pyrochlore magnets: how much can be learned from magnetization measurements? O. A. Petrenko, M. R. Lees and G. Balakrishnan, Journal of Physics: Condensed Matter 23, 164218 (2011).

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Unusual spectral renormalization in hexaborides, Swapnil Patil, Ganesh Adhikary, G Balakrishnan and Kalobaran Maiti , J. Phys.: Condens. Matter 23, 495601 (2011).

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Structural variety in iridate oxides and hydroxides from hydrothermal synthesis, Kripasindhu Sardar, Janet Fisher, David Thompsett, Martin R. Lees, Guy J. Clarkson, Jeremy Sloan, Reza J. Kashtiban and Richard I. Walton, Chemical Science 2, 1573 (2011).

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The temperature evolution of the magnetic correlations in pure and diluted spin ice Ho2-xY xTi2O7, L. J. Chang, Y. Su, Y. -J. Kao, Y. Z. Chou, K. Kakurai, R. Mittal, H. Schneider, Th. Bruckel, G. Balakrishnan, and M. R. Lees, Physica B 406, 2393 (2011).

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2010


Coexistance of spiral and commensurate structures in a triangular antiferromagnet KFe(MoO4)2, A. I. Smirnov, L. E. Svistov, L. A. Prozorova, A. Zheludev, M. D. Lumsden, E. Ressouche, O. A. Petrenko, M. Hagiwara, S. Kimura, K. Nishikawa, K. Kindo, A. Ya Shapiro and L. N. Demianets, Journal of Physics: Conference Series 200, 032068 (2010).

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Magnetic correlations in the spin ice Ho2−xYxTi2O7 as revealed by neutron polarization analysis, L. J. Chang, Y. Su, Y.-J. Kao, Y. Z. Chou, R. Mittal, H. Schneider, Th. Brückel, G. Balakrishnan, and M. R. Lees, Physical Review B 82, 172403 (2010).

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Hydrothermal Synthesis of a B-Site Magnetic Ruthenate Pyrochlore, Richard J. Darton, Scott S. Turner, Jeremy Sloan, Martin R. Lees, and Richard I. Walton, Crystal Growth and Design 10, 3819 (2010).

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Spin dynamics in the hyperkagome compound Gd3Ga5O12, P. P. Deen, O. A. Petrenko, G. Balakrishnan, B. D. Rainford, C. Ritter, L. Capogna, H. Mutka, and T. Fennell, Physical Review B 82, 174408 (2010).

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Field-driven magnetisation steps in Ca3Co2O6: A single-crystal neutron-diffraction study, C. L. Fleck, M. R. Lees, S. Agrestini, G. J. McIntyre, and O. A. Petrenko, EPL 90, 67006 (2010).

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Thermometers for low temperature Magic Angle Spinning NMR, T. F. Kemp, G. Balakrishnan, K. J. Pike, M. E. Smith, and R. Dupree, Journal of Magnetic Resonance 204, 169 (2010).

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Influence of 4f electronic states on the surface states of rare-earth hexaborides, Swapnil Patil, Ganesh Adhikary, Geetha Balakrishnan, and Kalobaran Maiti, Applied Physics Letters 96, 092106 (2010).

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Kagome staircase compound Co3V2O8 in an applied magnetic field: Single-crystal neutron diffraction study, O. A. Petrenko, N. R. Wilson, G. Balakrishnan, D. McK Paul, and G. J. McIntyre, Physical Review B 82, 104409 (2010).

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Triangular lattice antiferromagnet RbFe(MoO4)2, A. I. Smirnov, L. E. Svistov, L. A. Prozorova, O. A. Petrenko, and M. Hagiwara, Physics Uspekhi 53, 844 (2010).

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Magnetic excitations in the XY-pyrochlore antiferromagnet Er2Ti2O7, S. S. Sosin and L. A. Prozorova, M. R. Lees, G. Balakrishnan, and O. A. Petrenko, Physical Review B 82, 094428 (2010).

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Preparation and Characterization of Iron Oxide–Silica Composite Particles Using Mesoporous SBA-15 Silica as Template and Their Internalization Into Mesenchymal Stem Cell and Human Bone Cell Lines, Humphrey H. P. Yiu, Martin J. Maple, Martin R. Lees, Iryna Palona, Alicia J. El Haj, and Jon Dobson, IEEE Transactions on Nanobioscience 9, 165 (2010).

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Damage evolution in Au-implanted Ho2Ti2O7 titanate pyrochlore, Yanwen Zhang, Jacek Jagielski, In-Tae Bae, Xia Xiang, Lionel Thomé, Geetha Balakrishnan, Don M. Paul, and William J. Weber, Nuclear Instruments and Methods in Physics Research B 268, 3009 (2010).

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2009


Magnetoelastic coupling in CuFeO2, G. Quirion, M.J. Tagore, M.L. Plumer, and O.A. Petrenko, Journal of Physics: Conference Series 145, 012070 (2009).

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Ferro I phase and gadolinium, J. F. Collingwood, S. B. Palmer, M. R. Lees, C. Edwards, J. A. Santos, J. B. Sousa, and D. C. Jiles, Physical Review B 79, 104401 (2009). Full Text PDF: Download (882 kB)


Resonant X-ray scattering study of Ca3Co2O6 ground state: Preliminary results of magnetic field effects, C. Mazzoli, A. Bombardi, S. Agrestini, and M. R. Lees, Physica B-Condensed Matter 404, 3042-3044 (2009).

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Magnetic phase diagram of magnetoelectric CuFeO2 in high magnetic fields, G. Quirion, M. L. Plumer, O. A. Petrenko, G. Balakrishnan, and C. Proust, Physical Review B 80, 064420 (2009).

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Chiral and collinear ordering in a distorted triangular antiferromagnet", A. I. Smirnov, L. E. Svistov, L. A. Prozorova, A. Zheludev, M. D. Lumsden, E. Ressouche, O. A. Petrenko, K. Nishikawa, S. Kimura, M. Hagiwara, K. Kindo, A. Y. Shapiro, and L. N. Demianets, Physical Review Letters 102, 037202 (2009).

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High quality single crystals of the SrR2O4 family of frustrated magnets, G. Balakrishnan, T. J. Hayes, O. A. Petrenko, and D. M. K. Paul, Journal of Physics: Condensed Matter 21, 012202 (2009).

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Low frequency spin dynamics of the frustrated pyrochlore magnet Gd2Ti2O7, A. I. Smirnov, S. S. Sosin, V. N. Glazkov, O. A. Petrenko, G. Balakrishnan, and M. E. Zhitomirsky, Journal of Physics: Conference Series 150,  042188 (2009).

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Field induced magnetic order in the frustrated magnet Gadolinium Gallium Garnet, O. A. Petrenko, G. Balakrishnan, D. McK. Paul, M. Yethiraj, G.J . McIntyre, and A. S. Wills, Journal of Physics: Conference Series 145,  012026 (2009).

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Magnetic measurements of suspended functionalised ferromagnetic beads under DC applied fields, L. V. De Los Santos, J. Llandro, D. Lee, T. Mitrelias, J. J. Palfreyman, T .J. Hayward, J. Cooper, J. A. C. Bland, C. H. W. Barnes, J. L. Arroyo, and M. Lees, Journal of Magnetism and Magnetic Materials 321, 2129 (2009).

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2008


Probing nanoscale inhomogeneities in transition metal oxides with ultrafast mid-infrared spectroscopy, R. P. Prasankumar, H. J. Lee, H. Okamura, H. Imai, Y. Shimakawa, Y. Kubo, S. Zvyagin, K. V. Kamenev, G. Balakrishnan, D. M. Paul, S. A. Trugman, A.J. Taylor, and R. D. Averitt, Physica B-Condensed Matter 403, 1401 (2008).

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Nature of the magnetic order in Ca3Co2O6, S. Agrestini, L. C. Chapon, A. Daoud-Aladine, J. Schefer, A. Gukasov, C. Mazzoli, M. R. Lees, and O. A. Petrenko, Physical Review Letters  101: Art. No. 097207 (2008).

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Spin, orbital ordering, and magnetic dynamics of LaVO3: Magnetization, heat capacity, and neutron scattering studies, L. D. Tung, A. Ivanov, J. Schefer, M. R. Lees, G. Balakrishnan, and D. M. Paul, Physical Review B 78, 054416 (2008).

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Resonant x-ray scattering investigation of the multipolar ordering in Ca3Co2O6, A. Bombardi, C. Mazzoli, S. Agrestini, and M. R. Lees , Physical Review B 78, 100406 (2008).

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Incommensurate magnetic ground state revealed by resonant x-ray scattering in the frustrated spin system Ca3Co2O6, S. Agrestini, C. Mazzoli, A. Bombardi, and M.R. Lees, Physical Review B 77, 140403 (2008).

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Evidence of soft modes in magnetoelectric CuFeO2: Ultrasonic velocity measurements and Landau theory, G. Quirion, M. J. Tagore, M. L. Plumer, and O. A. Petrenko, Physical Review B 77, 094111 (2008).

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Spin dynamics of the pyrochlore magnets Gd2Ti2O7 and Gd2Sn2O7 in the paramagnetic state, S. S. Sosin, L. A. Prozorova, A. I. Smirnov, P. Bonville, G. L. J. Bras, and O. A. Petrenko, Physical Review B 77, 104424 (2008).

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Electronic texture of the thermoelectric oxide Na0.75CoO2, M. -H. Julien, C. de Vaulx, H. Mayaffre, C. Berthier, M. Horvatic, V. Simonet, J. Wooldridge, G. Balakrishnan, M. R. Lees, D. P. Chen, C. T. Lin, and P. Lejay, Physical Review Letters, 100, 096405 (2008).

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Synthesis of novel magnetic iron metal-silica (Fe-SBA-15) and magnetite-silica (Fe3O4-SBA-15) nanocomposites with a high iron content using temperature-programed reduction, H. H. P. Yiu, M. A. Keane, Z. A. D. Lethbridge, M. R. Lees, A. J. El Haj, and J. Dobson, Nanotechnology 19 , 255606 (2008).

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Low-temperature magnetic ordering in SrEr2O4, O. A. Petrenko, G. Balakrishnan, N. R. Wilson, S. de Brion, E. Suard, and L. C. Chapon, Physical Review B 78,  184410 (2008).

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2007


Low-energy spin dynamics of Heisenberg pyrochlore magnets, S. S. Sosin, A. I. Smirnov, L. A. Prozorova, O. A. Petrenko, M. E. Zhitomirsky, and J. -P. Sanchez, Journal of Magnetism and Magnetic Materials 310, 1590 (2007).

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Small-angle neutron scattering measurements of the vortex lattice in CaC6, R. Cubitt, J. S. White, M. Laver, M. R. Eskildsen, C. D. Dewhurst, D. M. Paul, A. J. Crichton, M. Ellerby, C. Howard, Z. Kurban, and F. Norris, Physical Review B 75, 140516 (2007).

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Magnetic phase diagrams of the Kagome staircase compounds Co3V2O8 and Ni3V2O8, N.R. Wilson, O.A. Petrenko and G. Balakrishnan, Journal of Physics: Condensed Matter 19, 145257 (2007).

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Magnetization reversal in orthovanadate RVO3 compounds (R=La, Nd, Sm, Gd, Er, and Y): Inhomogeneities caused by defects in the orbital sector of quasi-one-dimensional orbital systems, L. D. Tung, M. R. Lees, G. Balakrishnan, and D. M. Paul, Physical Review B 75, 104404 (2007).

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Magnetic phases in the Kagome staircase compound Co3V2O8 studied using powder neutron diffraction, N. R. Wilson, O. A. Petrenko, and L. C. Chapon, Physical Review B 75, 094432 (2007).

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Heat capacity and magnetic properties of a EuVO3 single crystal, L. D. Tung, M. R. Lees, G. Balakrishnan, and D. M. Paul, Physical Review B 76, 064424 (2007). Full Text PDF: Download (645 kB)


2006



Magnetic phase diagram, critical behavior, and two-dimensional to three-dimensional crossover in the triangular lattice antiferromagnet RbFe(MoO4)2, L. E. Svistov, A. I. Smirnov, L. A. Prozorova, O. A. Petrenko, A. Micheler, N. Buttgen, A. Y. Shapiro, and L. N. Demianets, Physical Review B 74, 024412 (2006).

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Magnetic resonance in the pyrochlore antiferromagnet Gd2Ti2O7, S. S. Sosin, A. I. Smirnov, L. A. Prozorova, G. Balakrishnan, and M. E. Zhitomirsky, Physical Review B 73, 212402 (2006).

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The magnetic field and pressure dependence of the magnetic ordering transition in NaxCoO2 (0.6 <= x <= 0.72), J. Wooldridge, D. M. Paul, G. Balakrishnan, and M. R. Lees,Journal of Physics: Condensed Matter 18, 4731-4739 (2006).

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Tunable temperature-induced magnetization jump in a GdVO3 single crystal, L. D. Tung, Physical Review B 73, 024428 (2006).

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Effect of externally applied pressure on the magnetic behavior of Cu2Te2O5(BrxCl1-x)(2), S. J. Crowe, M. R. Lees, D. M. Paul, R. I. Bewely, J. Taylor, G. McIntyre, and O. Zaharko, Physical Review B 73, 144410 (2006).

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Incommensurate magnetic ordering in Cu2Te2O5X2 (X=Cl,Br) studied by single crystal neutron diffraction, O. Zaharko, H. Ronnow, J. Mesot, S. J. Crowe, D. M. Paul, P. J. Brown, A. Daoud-Aladine, A. Meents, A. Wagner, M. Prester, and H. Berger, Physical Review B 73, 064422 (2006).

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O. R. Mercier, R. G. Buckley, H. J. Trodahl, C. Berhard, and G. Balakrishnan, Low-energy excitations in La1.2Sr1.8Mn2O7 investigated by ellipsometry, Physical Review B 72, 214437 (2005).

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2005


Spin wave dispersion and magnons from short range order in tapiolite (FeTa2O6); a quasi-two-dimensional antiferromagnet, J. P. Hague, E. M. L. Chung, D. Visser, G. Balakrishnan, E. Clementyev, D. M. Paul, and M.R. Lees, Journal of Physics: Condensed Matter 17, 7227 (2005).

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Single crystal neutron diffraction study of the magnetisation process in Ca3Co2O6, O. A. Petrenko, J. Wooldridge, M. R. Lees, P. Manuel, and V. Hardy, European Physical Journal B 47, 79 (2005).

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Single crystal growth of CrB2 using a high-temperature image furnace, G. Balakrishnan, S. Majumdar, M. R. Lees, and D. M. Paul, Journal of Crystal Growth 274, 294 (2005).

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Temperature and field dependence of the spin magnetization density in SmMn2Ge2, A. M. Bebb, J. W. Taylor, J. A. Duffy, Z. F. Banfield, M. J. Cooper, M R. Lees, J. E. McCarthy, and D. N. Timms, Physical Review B 71, 024407 (2005).

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Magnetocaloric effect in pyrochlore antiferromagnet Gd2Ti2O7 , S. S. Sosin, L. A. Prozorova, A. I. Smimov, A I. Golov, I. B. Berkutov, O. A. Petrenko, G. Balakrishnan, and M. E. Zhitomirsky, Physical Review B 71, 094413 (2005).

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Field-induced magnetic phase transitions in a GdSi single crystal, L. D. Tung, M. R. Lees, G. Balakrishnan, and D. M. Paul, P. Schobinger-Papamantellos, O. Tegus, P E. Brommer, K H J. Buschow, Physical Review B 71, 144410 (2005).

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Revised magnetic properties of CuFeO2 - a case of mistaken identity, O. A. Petrenko, M. R. Lees, G. Balakrishnan, S. de Brion, and G. Chouteau, Journal of Physics: Condensed Matter 17, 2741 (2005).

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Adiabatic demagnetization of a pyrochlore antiferromagnet Gd2Ti2O7 ,S. S. Sosin, L. A. Prozorova, A. I. Smirnov, A. I. Golov, I. B. Berkutov, O. A. Petrenko, G. Balakrishnan, and M. E. Zhitomirsky, Jourmal of Magnetism and Magnetic Materials 290, 709 (2005).

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Inelastic neutron scattering study of the spin-gap behavior in Cu2Te2O5Br2, S. J. Crowe, S. Majumdar, M. R. Lees, D M. Paul, D. T. Adroja, and S. J. Levett, Physica B Condensed-Matter 359, 1219 (2005).

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Neutron inelastic scattering investigation of the magnetic excitations in Cu2Te2O2X2 (X=Br,Cl), S. J. Crowe, S. Majumdar, M. R. Lees, D. M. Paul, R. I. Bewley, S. J. Levett, and C. Ritter, Physical Review B 71, 224430 (2005).

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Neutron scattering studies of the spin ices Ho2Ti2O7 and Dy2Ti2O7 in applied magnetic field, T. Fennell, O. A. Petrenko, B. Fak, J. S. Gardner, S. T. Bramwell, and B. Ouladdiaf, Physical Review B 72, 224411 (2005).

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2004


Quantum tunneling of the magnetization in the Ising chain compound Ca3Co2O6, A. Maignan, V. Hardy, S. Herbert, M. Drillon, M. R. Lees, O. Petrenko, D. M. Paul, and D. Khomskii, Journal of Materials Chemistry 14 1231 (2004).

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Rare earth hexaborides: large single crystals, G. Balakrishnan, M. R. Lees, and D. M. Paul, Journal of Magnetism and Magnetic Materials 272-76, 601 (2004).

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Damage accumulation and amorphization in samarium titanate pyrochlore, Y. Zhang, V. Shuttanandan, R. Devanathan, S. Thevuthasan, D.E. McCready, J. Young, G. Balkrishnan, D.M. Paul, W.J. Weber, Nuclear Instruments and Methods in Physics Research Section B-Beam Interactions with Materials and Atoms 218, 89 (2004).

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Damage evolution on Sm and O sublattices in Au-implanted samarium titanate pyrochlore, Y. Zhang, W. J. Weber, V. Shutthanandan, R. Devanathan, S. Thevuthasan, G. Balakrishnan, and D. M. Paul, Journal of Applied Physics 95, 2866 (2004).

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Magnetic susceptibility and heat capacity investigations of the unconventional spin-chain compound Sr3CuPtO6, S. Majumdar, V. Hardy, M. R. Lees, D.M. Paul, H. Rousseliere, and D. Grebille, Physical Review B 69, 024405 (2004).

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Magnetic phase diagram of the antiferromagnetic pyrochlore Gd2Ti2O7, O. A. Petrenko, M. R. Lees, G. Balakrishnan, and D. M. Paul, Physical Review B, 70, 012402 (2004).

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Single crystals of the anisotropic Kagome staircase compounds Ni3V2O8 and Co3V2O8, G. Balakrishnan, O. A. Petrenko, M. R. Lees, and D. M. Paul, Journal of Physics-Condensed Matter 16, L347 (2004).

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Thermal stability and saturation magnetization of a new series of amorphous Fe80-xCoxP14B6 (20<=x<=40) alloys, V. I. Tkatch, S. G. Rassolov, V. V. Popov, V. Y. Kameneva, anf O. A. Petrenko, Materials Letters 58, 2988 (2004).

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On the possible coexistence of spiral and collinear structures in antiferromagnetic KFe(MoO4)(2), L. E. Svistov, A I. Smirnov, L A. Prozorova, O A. Petrenko, A Y. Shapiro, L N. Dem'yanets, JETP Letters 80, 204 (2004).

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Probing cation antisite disorder in Gd2Ti2O7 pyrochlore by site-specific near-edge x-ray-absorption fine structure and x-ray photoelectron spectroscopy, P. Nachimuthu, S. Thevuthasan, M. H. Engelhard, W. J. Weber, D. K. Shuh, N. M. Hamdan, B. S. Mun, E. M. Adams, D E. McCready, V. Shutthanandan, D. W. Lindle, G. Balakrishnan, D. M. Paul, E. M. Gullikson, R. C. C. Perera, J. Lian, L. M. Wang, and R. C. Ewing, Physical Review B 70, 100101 (2004).

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Specific heat studies of PrCoAl4 single crystal, L. D. Tung, D. M. Paul, M. R. Lees, P. Schobinger-Papamantellos, and K. H. J. Buschow, Journal of Magnetism and Magnetic Materials 281, 378 (2004).

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Neutron scattering investigation of the spin ice state in Dy2Ti2O7,  T. Fennell, O. A. Petrenko, B. Fak, S. T. Bramwell, M. Enjalran, T. Yavors'kii, M. J. P. Gingras, R. G. Melko, and G. Balakrishnan, Physical Review B 70, 134408 (2004).

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Readily prepared metallo-supramolecular triple helicates designed to exhibit spin-crossover behaviour, F. Tuna, M. R. Lees, G. J. Clarkson, anf M. J. Hannon, Chemistry - A European Journal 10, 5737 (2004).

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Magnetic properties of tapiolite (FeTa(2)0(6)); a quasi two-dimensional (2D) antiferromagnet, E. M. L. Chung, M. R. Lees, G. J. McIntyre, C. Wilkinson, G. Balakrishnan, J. P. Hague, D. Visser, and D. M. Paul, Journal of Physics, Condensed Matter 16, 7837 (2004).

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Spin glass-like antiferromagnetic interactions in iron phosphate glasses, J. L. Shaw, A. C. Wright, R. N. Sinclair, G. K. Marasinghe, D. Holland, M. R. Lees, and S C. Scales, Journal of Non-Crystalline Solids 345, 245 (2004).

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Magnetic quantum tunneling in Ca3Co2O6 studied by ac susceptibility: Temperature and magnetic-field dependence of the spin-relaxation time, V. Hardy, D. Flahaut, M. R. Lees, and O. A. Petrenko, Physical Review B 70, 214439 (2004).

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Temperature and time dependence of the field-driven magnetization steps in Ca3Co2O6 single crystals, V. Hardy, M. R. Lees, O. A. Petrenko, D. M. Paul, D. Flahaut, S. Hebert, and A. Maignan, Physical Review B, 70, 064424 (2004).

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Field-induced magnetization steps in intermetallic compounds and manganese oxides: The martensitic scenario, V. Hardy, S. Majumdar, S. J. Crowe, M. R. Lees, D. M. Paul, L. Herve, A. Maignan, S. Hebert, C. Martin, C. Yaicle, M. Hervieu, and B. Raveau, Physical Review B 69, 020407 (2004).

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ESR study of Nd0.5Sr0.5MnO3 single crystal, S. Angappane, M. Pattabiriman, G. Ranharajan, K. Sethupathi, G. Balakrishnan, D. M. Paul, M. R. Lees, and V. S. Sastry, Journal of Magnetism and Magnetic Materials 272-76, 1807 (2004).

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Power-law distribution of avalanche sizes in the field-driven transformation of a phase-separated oxide, V. Hardy, S. Majumdar, M. R. Lees, D. M. Paul, C. Yaicle, and M. Hervieu, Physical Review B 70, 104423 (2004).

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Field-induced magnetization steps in intermetallic compounds and manganese oxides: The martensitic scenario, V. Hardy, S. Majumdar, S. J. Crowe, M. R. Lees, D. M. Paul, L. Herve, A. Maignan, S. Hebert, C. Martin, C. Yaicle, M. Hervieu, and B. Raveau, Physical Review B 69, 020407 (2004).

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ESR study of Nd0.5Sr0.5MnO3 single crystal, S. Angappane, M. Pattabiriman, G. Ranharajan, K. Sethupathi, G. Balakrishnan, D. M. Paul, M. R. Lees, and V.S. Sastry, Journal of Magnetism and Magnetic Materials 272-76, 1807 (2004).

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2003


Specific heat investigation of the magnetic ordering in two frustrated spin-chain oxides: Ca3Co2O6 and Ca3CoRhO6, V. Hardy, M. R. Lees, A. Maignan, S. Herbert, D. Flahaut, C. Martin, and D. M. Paul, Journal of Physics-Condensed Matter 15, 5737 (2003).

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Growth of large single crystals of rare earth hexaborides, G. Balakrishnan, M. R. Lees and D. M. Paul , Journal of Crystal Growth 256, 206 (2003).

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Two- and three-dimensional magnetic order in the layered cobalt oxychloride Sr2CoO3Cl, C. S. Knee, D. J. Price, M. R. Lees, and M. T. Weller Physical Review B 68, 174407 (2003).

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Role of electronic correlations on the phonon modes of MnO and NiO, E. M. L. Chung, D. M. Paul, G. Balakrishnan, M. R. Lees, A. Ivanov, and M. Yethiraj, Physical Review B 68, 140406 (2003).

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Specific heat and magnetization study on single crystals of the frustrated quasi-one-dimensional oxide Ca3Co2O6 , V. Hardy, S. Lambert, M. R. Lees, and D. M. Paul, Physical Review B 68, 014424 (2003).

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Triangular lattice antiferromagnet RbFe(MoO4)2 in an applied magnetic field, L. A. Prozorova, L. E. Svistov, A. I. Smirnov, O. A. Petrenko, L. N. Demianets, and A. Y. Shaprio , Journal of Magnetism and Magnetic Materials 258, 394 (2003).

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Quasi-two-dimensional antiferromagnet on a triangular lattice RbFe(MoO4)2, L. E. Svistov, A. I. Smirnov, L. A. Prozorova, O. A. Petrenko, L. N. Demianets, A. Y. Shaprio, Physical Review B 67, 094434 (2003).

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Er2Ti2O7: Evidence of quantum order by disorder in a frustrated antiferromagnet, J. D. M. Champion, M. K. Harris, P. C. W. Holdsworth, A. S. Wills, G. Balakrishnan, S. T. Bramwell, E. Cizmar, T. Fennall, J.S. Gardner, J. Lago, D. F. McMorrow, M. Orendac, A. Orendacova, D. M. Paul, R. I. Smith, M. T. F. Telling, and A. Wildes, Physical Review B 68, 020401 (2003).

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Oxygen moment formation and canting in Li2CuO2, E. M. L. Chung, G. J. McIntyre, D. M. Paul, G. Balakrishnan, and M. R. Lees, Physical Review B 68, 144410 (2003).

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Magnetic properties of Pr1-xSr1+xMnO4 (0.3 <= x <= 0.8) single crystals, C. V. Tomy, R. Kumar, G. Balakrishnan, M. R. Lees, and D. M. Paul, Acta Physica Polonica B 34, 1493 (2003).

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Triangular lattice antiferromagnet RbFe(MoO4)2 in an applied magnetic field, L. A. Prozorova, L. E. Svistov, A. I. Smirnov, O. A. Petrenko, L. N. Demianets, and A. Y. Shaprio, Journal of Magnetism and Magnetic Materials 258, 394 (2003).

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Quasi-two-dimensional antiferromagnet on a triangular lattice RbFe(MoO4)2, L. E. Svistov, A. I. Smirnov, L. A. Prozorova, O. A. Petrenko, L. N. Demianets, and A. Y. Shaprio, Physical Review B 67, 094434 (2003).

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Raman scattering study of Nd1-xSrxMnO3 (x = 0.3, 0.5), K.Y. Choi, P. Lemmens, G. Guntherodt, M. Pattabiraman, G. Rangarajan, V. P. Gnezdilov. G. Balakrishnan, D. M. Paul, and M. R. Lees, Journal of Physics-Condensed Matter 15 , 3333 (2003).

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Oxygen moment formation and canting in Li2CuO2, E.M.L. Chung, G. J. McIntyre, D. M. Paul, G. Balakrishnan, and M. R. Lees, Physical Review B 68, 144410 (2003). Full Text PDF: Download (745 kB)


Power-law distribution of avalanche sizes in the field-driven transformation of a phase-separated oxide, V. Hardy, S. Majumdar, M. R. Lees, D. M. Paul, C. Yaicle, and M. Hervieu, Physical Review B 70, 104423 (2004).

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Observation of spontaneous magnetization jumps in manganites, V. Hardy, A. Maignan, S. Hebert, C. Yaicle, C. Martin, M. Hervieu, M. R. Lees, G. Rowlands, D. M. Paul, and B. Raveau, Physical Review B 68, 220402 (2003).

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Magnetic behaviour of the tetravalent praseodymium compound Sr2PrO4, S. Majumdar, M. R. Lees, G. Balakrishnan, and D. M. Paul Journal of Physics-Condensed Matter 15, 7585 (2003).

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Magnetization process in the spin-ice compound Ho2Ti2O7, O. A. Petrenko, M. R. Lees, and G. Balakrishnan, Physical Review B 68, 012406 (2003).

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2002


Quasielastic Neutron Scattering of Liquid Te50Se50 in the Semiconductor-to-Metal Transition Range, A. Chiba, Y. Ohmasa , M. Yao, O. A. Petrenko, and Y. Kawakita , Journal of Phys. Soc. Japan 71, 504 (2002).

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Field-induced order and magnetization plateaux in frustrated antiferromagnets, A. Honecker, O. A. Petrenko, and M. E. Zhitomirsky, Physica B 312-313, 609 (2002).

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Temperature dependence of the spin and orbital magnetization density in Sm 0.982Gd 0.018Al2 around the spin-orbital compensation point, J. W. Taylor, J. A. Duffy, A. M. Bebb, M. R. Lees, L. Bouchenoire, S. D. Brown, and M. J. Cooper, Physical Review B 66, 161319 (2002)

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Spin-polarized electron momentum density distributions in the Invar system Fe3Pt, J. W. Taylor, J. A. Duffy, A. M. Bebb, J. E. McCarthy, M. R. Lees, M. J. Cooper, and D. N. Timms, Physical Review B 65, 224408 (2002).

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Spin-polarized electron momentum density disributions REMn2Ge2 (RE=Gd, La), J. W. Taylor, J. A. Duffy, A. M. Bebb, M. J. Cooper, M. R. Lees, S. Majumdar, J. E. McCarthy, D. N. Timms, C. Detlefs, and P. C. Canfield, Physica B 318, 267 (2002).

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Ferromagnetic Fullerene, R. A.Wood, M. H. Lewis, M. R. Lees, S. M. Bennington, M. G. Cain, and N. Kitamura, J. of Physics: Condensed Matter 14, 385 (2002).

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A comparative study of the atomic dynamics of icosahedral ZnMgHo and ZnMgHo by neutron inelastic scattering, M. Rouijaa, J. B. Suck, R. Sterzel, and O. A. Petrenko, Journal of Alloys and Compounds 342, 314 (2002).

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Microwave properties of Nd0.5Sr0.5MnO3: a key role of the (x(2)-y(2))-orbital effects, S. Zvyagin A. Angerhofer, K. V. Kamenev, L. C. Brunel, G. Balakrishnan and D. M. Paul, Solid Communications 121, 117 (2002).

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Domain structure of the anti ferromagnetic insulating state in Nd0.5Sr0.5MnO3, I. O. Shklyarevskiy, A. B. Chizhik, S. L. Gnatchenko, P. J. M. van Bentum, P. C. M. Christianen, J. C. Maan, K. V. Kamenev, G. Balakrishnan, and D. M. Paul, Journal of Magnetism and Magnetic Materials 238, 140 (2002).

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Mn-55 NMR investigation of Nd1-xSrxMnO3 (0.1 <=x <= 0.5), M. Pattabiraman, P. Murugaraj, G. Rangarajan, C. Dimitropoulos, J. P. Ansermet, G. Papavassiliou, G. Balakrishnan, D. M. Paul and M. R. Lees MR, Physical Review B 66, 224415 (2002).

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Growth of SrRuO3 thin films on MgO substrates by pulsed laser ablation, S. K. Singh, M. R. Lees, R. K. Singh and S. B. Palmer, Journal of Physics D Applied Physics 35, 2243 (2002).

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Field-induced transitions in the highly frustrated magnet gadolinium gallium garnet - long or short ranger order? O. A. Pentrenko, G. Balakrishnan, D. M. Paul, M. Yethiraj and J. Klenke J. Applied Physics A-Materials Science and Processing 74, S760 (2002).

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Field-induced partial order in the spin ice dysprosium titanate, T. Fennell, O. A. Petrenko, G. Balakrishnan, S. T. Bramwell, J. D. M. Champion, B. Fak, M. J. Harris and D. M. Paul, Applied Physics A-Materials Science and Processing 74, S889 (2002).

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Polarized Raman scattering in single crystals of Nd0.7Sr0.3MnO3, M. Pattabiraman, G. Rangarajan, P. K. Y. Choi K. Y, Lemmens, G. Guentherodt, G. Balakrishnan, D. M. Paul and M. R. Lees, Pramana Journal of Physics 58, 1013 (2002).

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Pressure-induced crossover from two - to three dimensional magnetic correlations in La1.4Sr1.6Mn2O7 manganite, K. V. Kamenev, G. Balakrishnan, D. M. Paul, G. J. Mcintyre, High Pressure Research 22, 135 (2002).

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2001


Classical Heisenberg antiferromagnet on a garnet lattice: A Monte Carlo Simulation, O. A. Petrenko and D. M. Paul, Physical Review B 63, 024409 (2001).

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Advances in catalytic chain transfer polymerisation mediated by cobaloximes. S. A. F. Bon, D. R. Morsley, J. Waterson, D. M. Haddleton, M. R. Lees, and T. Horne, Macromolecular Symposia 165, 29 (2001).

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Thermodynamic and magnetic properties of multicomponent (Fe, Ni)70Zr10B20 amorphous alloy powders made by mechanical alloying, Y. J. Liu, I. T. H. Chang, and M. R. Lees, Materials Scince and Engineering A-Structural Materials Properties Microstructure and Processing 2001, 304, 992 (2001).

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Influences of oxide phases on the coercivity of mechanically alloyed multicomponent Fe-based amorphous alloys, Y. J. Liu, I. T. H. Chang and M. R. Lees, Scripta Materialia 44, 2729-2734 (2001).

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Pressure effects on the magnetic and structural properties of layered manganites, K. V. Kamenev, W. G. Marshall, M. R. Lees, D. M. Paul, G. Balakrishnan, and V. G. Tissen, European Magnetic Materials and Applications 373, 581 (2001).

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X-ray study of Nd0.5Sr0.5MnO 3 manganite structure above and below the ferromagnetic metal-antiferromagnetic insulator spontaneous phase transition, V. Eremenko, S. Gnatchenko, N. Makedonska , Y. Shabakayeva, M. Shvedun, V. Sirenko, J. Fink-Finowicki , K. V. Kamenev, G. Balakrishnan, and D. M. Paul, Low Temperature Physics 27, 930 (2001).

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Domain structure of the antiferromagnetic insulating state in Nd0.5Sr0.5MnO 3:, I. O. Shklyarevskiy, M. Y. Shvedun, S. L. Gnatchenko, P. J. M. van Bentum, P. C. M. Cristianen, J. C. Maan, K. V. Kamenev, G. Balakrishnan, and D. M. Paul, Low Temperature Physics 27, 923 (2001).

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Pressure-enhanced 3D antiferromagnetic correlations in La1.4Sr1.6Mn2O7, K. V. Kamenev, G. J. McIntyre, Z. Arnold, J. Kamarad, M. R. Lees, G. Balakrishnan, E. M. L. Chung, and D. M. Paul, Physical Review Letters 87, 167203 (2001).

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Optical conductivity studies of La3/2Sr1/2NiO4: Lattice effect on charge ordering, J. H. Jun, D. W. Kim, T. W. Noh, H. C. Kim, H. C. Ri, S. J. Levett , M. R. Lees, D. M. Paul, and G. Balakrishnan, Physical Review B 64, 165106 (2001).

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High magnetic-field study of the magnetization of layered manganite Nd2-2xSr1+2xMn2O7 single crystals. B. Garcia-Linda, C. Marquina, M. Hilbers, M. R. Ibarra, P. A. Algarabel, A. del Moral, G. Balakrishnan, M. R. Lees, and D. M. Paul, Physica B 294, 107 (2001).

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O(Mn) vibrational bands in double-layered manganites: first and second order Raman scattering, A. E. Pantoja, H. J. Trodahl, A. Fainstein, R. G. Pregliasco, R. C. Buckley, Balakrishnan, M. R. Lees, and D. M. Paul, Physical Review B 63, 132406 (2001).

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Ultrasonic investigation of Nd0.5Sr0.5MnO3, S. Zvyagin, H. Schwenk, B. Luthi, K. V. Kamenev, D. M. Paul, G. Balakrishnan, V. I. Kamenev, T.G. Pashkevich, Journal of Magnetism and Magnetic Materials 226, 883 (2001).

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2000


Crystal Structures and Magnetic Properties of Rare-Earth Ultraphosphates, RP5,O14, (R =La, Nd, Sm, Eu, Gd), J. M. Cole, M. R. Lees, J. A. K. Howard, R.J. Newport, G.A. Saunders, and E. Schonherr, Journal of Solid State Chemistry 150, 377 (2000).

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Crossover from low-dimensional to three-dimensional ferromagnetism in CePd1-xPtx Sb alloys, D. T. Adroja, J.G.M. Armitage, P. C. Riedi, M. R. Lees, and O.A. Petrenko, Physical Review B 61, 1232 (2000).

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High-Magnetic-Field behavior of the traingular-lattice antiferromagnet CuFeO2, O. A. Petrenko, G. Balakrishnan, M. R. Lees, D. M. Paul, and A. Hoser, Physical Review B 62, 8983 (2000).

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Field induced ordering in highly frustrated antiferromagnets, M. E. Zhitomirsky, A. Honecker, and O. A. Petrenko, Physical Review Letters 85, 3269 (2000).

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Pressure tuning of magnetic interactions in layered (La0.6Nd0.4)1.2Sr1.8Mn2O manganite, K. V. Kamenev, M. R. Lees, G. Balakrishnan, D. McK. Paul, W. G. Marshall, V. G. Tissen and M. V. Nefedova, Physical Review Letters 84, 2710 (2000).

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Volume and anisotropic spontaneous striction in layered manganites: Role of charge localization and magnetic interactions, B. Garcia-Landa, C. Marquina, M. R. Ibarra, G. Balakrishnan, M. R. Lees, and D. McK. Paul, Physical Review Letters 84, 995 (2000).

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1999


Magnetic frustration and order in gadolinium gallium garnet, O. A. Petrenko, D. McK Paul, C. C. Ritter, T. Zeiske, M. Yethiraj, Physica B 266, 41 (1999).

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Far-infra red vibrational mode in Cu1-xMxGe1-ySiyO3 (M=Zn, Cd, Ni), J. J. McGuire, T. Room, T.E. Mason, T. Timusk, H. Dabkowska, S. C. Coad, and D. McK. Paul, Physical Review B 59, 1157 (1999).

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Transport and Thermodynamic Properties of CeCuxAg1-xAl3, D. Werner, E. Bauer, J. M. Martin, M. R. Lees, Physica B 261, 10 (1999).

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Correlation of the magnetic and magnetotransport properties in a Nd1.5Sr1.5Mn2O7 single crystal, B. Garcia-Landa, M. R. Ibarra, G. Balakrishnan, M.R. Lees D. McK. Paul, and Z. Arnold, Physical Review B 60, 5440 (1999).

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Specific heat capacity of Pr0.6(CaxSr1-x)0.4MnO3 (0.0<x<1.0), M. R. Lees, O. A. Petrenko, G. Balakrishnan, and D. McK Paul, Physical Review B 59, 1298 (1999).

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Pressure induced change in the magnetic and transport properties of layered (La0.6Nd0.4)1.2Sr1.8Mn 2O7, K. V. Kamenev, M. R. Lees, G. Balakrishnan, C. D. Dewhurst, and D. McK. Paul, International Conference on High Pressure Physics, Italy 1998. Physica B 265, 191 (1999).

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Visualisation of the antiferromagnetic insulator-ferromagnetic metal phase transition in manganite Nd0.5Sr 0.5MnO3, S. L. Gnatchenko, A. B. Chizhik, I. O. Shklyarevskii, D. N. Merenkov, V. I. Kamenev, Y. G. Pashkevich, K. V. Kamenev, G. Balakrishnan, and D. McK. Paul, Low Temp. Physics 25, 744 (1999).

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1998


Electron spin resonance in the doped spin Peierls compound Cu1-xNix GeO3, V. Glazkov, A. I. Smirnov, O. A. Petrenko, D. McK. Paul , A. G. Vetkin, and R.M. Erimina, J. Phys.: Condens. Matter 10, 7879 (1998).

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Single crystal growth of rare earth titanate pyrochlores, G. Balakrishnan, O. A. Petrenko, M. R. Lees, and D. McK. Paul, J. Phys.: Condens. Matter 10, L723 (1998).

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Neutron-diffraction study of CeCuGa3, J. M. Martin, M. R. Lees, and D. McK. Paul, P. Dai, C. Ritter, and Y.J. Bi, Physical Review B-Condensed Matter 57, 7419 (1998).

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Investigation of the low-temperature spin-liquid behavior of the frustrated magnet Gadolinium Gallium Garnet, O.A. Petrenko, C. Ritter, M. Yethiraj, and D. McK Paul, Phys. Rev. Letts 80, 4570 (1998).

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Competing exchange interactactions in Li2CuO2, M. Boehm, S. M. Coad, B. Roessli, A. Zheludev, M. Zolliker, P. Boni, D. Mc K. Paul, H. Eisaki, N. Motoyama, and S. Uchida, Europhys. Letters 43, 77 (1998).

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Single crystal growth by the floating zone method of a geometrically frustrated pyrochlore antiferromagnet Tb2Ti2O7 , J. S. Gardner, B. D. Gaulin, and D. McK. Paul, J. Crys.Growth. 191, 740 (1998).

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Colossal magnetoresistance in Gd1/2Sr1/2MnO3, B. Garcia-Landa, J. M. De Teresa, M. R. Ibarra, C. Ritter, R. Drost, and M. R. Lees, J. of Appl. Phys. 83, 7664 (1998).

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Neutron powder diffraction study of the magnetic and structural properties of Pr0.6(CaxSr1-x)0.4MnO3 (0 < x < 1), M. R. Lees, J. Barratt, G. Balakrishnan, D. McK Paul, and C. Ritter, Phys. Rev. B 58, 8694 (1998).

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Magnetic properties of (Pr(Ca-Sr))MnO3 studied by NMR, G. J. Tomka, P. C. Riedi, Cz. Kapusta, G. Balakrishnan, D. McK Paul, M. R. Lees, and J. Barratt, 7th Joint MMM-Intermag Conference, San Francisco-USA 1997. J of Appl. Phys. 83, 7151 (1998).

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Magnetic and structural properties of La1-xSrxMnO3 D. McK Paul, K. V. Kamenev, G. Balakrishnan, A. J. Campbell, M. R. Lees, and G. J. McIntyre, Understanding and utilizing colossal magnetoresistance materials, London 1997. Phil. Trans. Royal Soc. London A 356, 1543 (1998).

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Primary role of the structural phase transition in the strongly coupled structure and magnetism of La0.835Sr0.165MnO3 single crystal, K. V. Kamenev, G. J. McIntyre, D. McK. Paul, M. R. Lees, and G. Balakrishnan, Physical Review B 57, R6775 (1998).

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1997


Magnetic excitations in single crystals of Cu1-xNixGeO3, S. Coad, et al., Physica B 239, 350 (1997).

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Triangular antiferromagnets, M. F. Collins and O. A. Petrenko, Canadian Journal of Physics 75, 650 (1997).

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Spin liquid behaviour of Gadolinium Gallium Garnet, O. A. Petrenko, C. Ritter, M. Yethiraj, and D. MCK Paul, Physica B 241, 727 (1997).

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The structural magnetic and transport properties of Pr0.6(CaxSr1-x)0.4MnO3. M. R. Lees, L. J. Chang, J. Barratt, G. Balakrishnan, C. V. Tomy, D. McK. Paul, C. D. Dewhurst, and C. Ritter, SCES, Zurich Switzerland, 1996. Physica B 230-232, 313 (1997).

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Pressure-induced changes in transport properties of layered La1.2Ca1.8Mn2O7, K. V. Kamenev, M. R. Lees, G. Balakrishnan, and D. M. Paul, Physical Review B 56, 12688 (1997).

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A structural transition induced by a magnetic field in La1-xSrxMnO3, A. J. Campell, G. Balakrishnan, M. R. Lees , D. McK. Paul, and G. J. McIntyre, Physica B, 241, 451 (1997).

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Single-Crystal Neutron-Diffraction Study of a Structural Phase Transition Induced by a Magnetic Field in La1-xSrxMnO3 , A. J. Campbell, G. Balakrishnan, M. R. Lees, D. M. Paul, and G. J. McIntyre, Physical Review B 55, R8622 (1997).

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Influence of pressure on structural and magnetic phase transitions in La0.835Sr0.165MnO3, K. Kamenev et al., Physical Review B 56, 2285 (1997).

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Single-crystal growth and properties of the double-layered manganese oxides, G. Balakrishnan, M. R. Lees, and D. M. Paul, Journal of Physics-Condensed Matter 9, L471 (1997).

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1996


Magnetic-Resonance In Pure and Diamagnetically Diluted Spin-Peierls CuGeO3, A. I. Smirnov et al., JETP Letters 64, 305 (1996).

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Neutron-Scattering and Susceptibility Measurements On Single Crystal Of Cu1-x(Zn/Ni)xGeO3, S. Coad, J. G. Lussier, D. F. McMorrow, and D. McK. Paul, Journal of Physics-Condensed Matter 8, 6251 (1996).

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Synchrotron X-Ray-Scattering Study Of Magnetic-Field-Induced Transitions In Cu1-x(Zn/Ni)xGeO3 , V. Kiryukhin, B. Keimer, J. P. Hill, S. M. Coad and McK. Paul, Physical Review 54, 7269 (1996).

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The temperature dependence of the spin-Peierls energy gap in CuGeO3, J. G. Lussier, S. M. Coad, D. F. McMorrow, and D. McK. Paul, Journal Of Physics-Condensed Matter 8, L59 (1996).
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X-ray single-crystal study of the low-temperature structure of KNiCl3, O. A. Petrenko, M. A. Lumsden, M. D. Lumsden, and M. F. Collins, Journal of Physics-Condensed Matter 8, 10899 (1996).

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Long range magnetic ordering in the Kondo lattice CeCuGa3, J. M. Martin, D. McK. Paul, M. R. Lees, and E. Bauer, Journal of Magnetism and Magnetic Materials 159, 223 (1996).

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Insulator-metal transitions in Pr0.7Ca0.3MnO3 induced by a magnetic field, J. Barratt, M. R. Lees, G. Balakrishnan, and D. McK. Paul, Applied Physics Letters 68, 424 (1996).

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Growth, transport and magnetic properties of Pr1-xCaxMnO3-d thin films, S. K. Singh, S. B. Palmer, G. Balakrishnan, D. McK. Paul, and M. R. Lees, Applied Physics Letters 69, 263 (1996).

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Low temperature magnetoresistance and magnetic ordering in Pr1-xCaxMnO3-d , M. R. Lees, J. Barratt, C. D. Dewhurst, G. Balakrishnan, and D. McK Paul, Journal of Physics: Condensed Matter 8, 2967 (1996).

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Pr0.67Ca0.33MnO3 /YBa2Cu3O7-d thin film bi layers grown by pulsed laser ablation deposition, S. K. Singh, S. B. Palmer, D. McK. Paul, and M. R. Lees, Journal of Physics D: Applied Physics 29, 2522 (1996).

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Field induced insulator-metal transition in Pr1-xCaxMnO3. M. R. Lees, J. Barratt, C. D. Dewhurst, G. Balakrishnan, C. V. Tomy, and D. McK Paul, SCES, Goa India, 1995. Physica B 223-224, 532 (1996).

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The specific-heat and a first-order phase-transition due to charge ordering In Nd1/2Sr1/2 MnO3 In a Magnetic-Field, N. J. Garfield, M. A. Howson, G. Balakrishnan, and D. M. Paul, Czechoslovak Journal Of Physics , 46, 1225 (1996).

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1995


Influence of charge and magnetic ordering on the insulator metal transition in Pr1-xCaxMnO3, M. R. Lees, J. Barratt, G. Balakrishnan, D. McK. Paul, and M. Yethiraj, Physical Review B 52, 14303 (1995).

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Observation of the Neel State in Doped CuGeO3 , J. G. Lussier, S.M. Coad, D. F. McMorrow, and D. M cK. Paul, Journal Of Physics-Condensed Matter 7, L325 (1995).

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