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Dr Santosh Kumar

Background

I completed my Ph.D under the supervision of Prof. C. V. Tomy from Department of Physics, Indian Institute of Technology Bombay, India. My research area includes Superconductivity and Magnetism. In my PhD, I have studied the vortex phase diagram of some low Tc superconducting compounds via detailed magnetization and electrical resistivity measurements.

Research Interests

Currently, I am working as a Post Doctoral Research Fellow under the supervision of G. Balakrishnan and M. R. Lees in the Department of Physics, University of Warwick. I am an experimentalist working in a joint theoretical-experimental project focussed on the physics of design of rare earth-transition metal permanent magnets. My research work includes single crystal growth of rare earth-transition metal based permanent magnets and their magnetic characterizations.

Publications

  1. Santosh Kumar, Ravi P. Singh, A. Thamizhavel, C. V. Tomy and A. K. Grover, Vortex phase diagram study in the superconductor Ca3Ir4Sn13, Mater. Res. Express 5, 106002 (2018).
  2. Christopher E. Patrick, Santosh Kumar, Kathrin Gotze, Matthew J Pearce, John Singleton, George Rowlands, Geetha Balakrishnan, Martin R. Lees, Paul A. Goddard and Julie B. Staunton, Field-induced canting of magnetic moments in GdCo5 at finite temperature: first principles calculations and high-field measurements, J. Phys.: Condens. Matter 30, 32LT01 (2018).
  3. Christopher E. Patrick, Santosh Kumar, Geetha Balakrishnan, Rachel S. Edwards, Martin R. Lees, Leon Petit and Julie B. Staunton, Calculating the magnetic anisotropy of rare-earth/transition-metal ferrimagnets, Phys. Rev. Lett. 120, 097202 (2018).
  4. Christopher E. Patrick, Santosh Kumar, Geetha Balakrishnan, Rachel S. Edwards, Martin R. Lees, Eduardo Mendive-Tapia, Leon Petit and Julie B. Staunton, Rare-earth/transition-metal magnetic interactions in pristine and (Ni,Fe)-doped YCo5 and GdCo5, Physical Review Materials 1, 024411 (2017).
  5. Santosh Kumar, Ravi P. Singh, A. Thamizhavel, C. V. Tomy and A. K. Grover, Unveiling of Bragg glass to vortex glass transition by an ac driving force in a single crystal of Yb3Rh4Sn13, Supercond. Sci. Technol. 28, 085013 (2015).
  6. Santosh Kumar, C. V. Tomy, G. Balakrishnan, D. McK Paul and A. K. Grover, Paramagnetic magnetization signals and curious metastable behaviour in field-cooled magnetization of a single crystal of superconductor 2H-NbSe2, J. Phys. Condens. Matter 27, 295701 (2015).
  7. Santosh Kumar, Ravi P. Singh, A. Thamizhavel, C. V. Tomy and A. K. Grover, Evidence of surface superconductivity and multi-quanta vortex states in a weakly-pinned single crystal of Ca3Ir4Sn13, Physica C 509, 42-48 (2015).
  8. Santosh Kumar, Ravi P. Singh, A. Thamizhavel, C. V. Tomy and A. K. Grover, Dual role of an ac driving force and the underlying two distinct order-disorder transitions in the vortex phase diagram of Ca3Ir4Sn13, Physica C 506, 69-75 (2014).

Conference Proceedings-

  1. C. Patrick, S. Kumar, L. Petit, E. Mendive-Tapia and J. Staunton, Magnetic properties of doped rare-earth/transition metal permanent magnets at finite temperature, IEEE International Magnetics Conference (INTERMAG) (2017).
  2. Santosh Kumar, Ravi P. Singh, A. Thamizhavel, C. V. Tomy and A. K. Grover, Paramagnetic response and novel metastability effects in a single crystal of superconducting Ca3Ir4Sn13, AIP Conf. Proc. 1731, 130013 (2016).
  3. Santosh Kumar, Ravi P. Singh, A. Thamizhavel, C. V. Tomy and A. K. Grover, Angular dependent study of spatial order-disorder transitions in the vortex matter of superconducting Yb3Rh4Sn13, AIP Conf. Proc. 1728, 020625 (2016).
  4. Santosh Kumar, Varun K. Kushwaha, Ravi P. Singh, A. Thamizhavel, C. V. Tomy and A. K. Grover, Elucidation of Peak Effect Phenomenon in a Single Crystal of Superconducting Ca3Ir4Sn13, AIP Conf. Proc. 1665, 130009 (2015).
  5. Santosh Kumar, C. V. Tomy, A. K. Grover, G. Balakrishnan and D. McK Paul, Crossover from more to less ordered vortex state on field-cooling a weakly-pinned crystal of Ca3Rh4Sn13, AIP Conf. Proc. 1512, 1202-1203 (2013).
  6. Santosh Kumar, Ajay D. Thakur, Ravi P. Singh, A. Thamizhavel, C. V. Tomy and A. K. Grover,Multi-quanta vortex states, crossover to Abrikosov Lattice and peak effect phenomenon in Ca3Ir4Sn13, AIP Conf. Proc. 1447, 909 (2012).





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Contact Details

Department of Physics
University of Warwick
Coventry CV4 7AL
United Kingdom

Contact Details

Office
P230

Telephone
+44 (0)2476151778
Fax
+44 (0)2476150897
E-Mail

S dot Kumar dot 1 at warwick dot ac dot uk