RRCAT- Raja Ramanna Centre for Advanced Technology, Indore

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Magnetic & Superconducting Materials Section
Publications since 1992 from Magnetic and Superconducting Materials Section (Formerly known as Low Temperature Physics Lab.)
Last updated on June 2010
2010 Varghese N., Vinod K. , Chattopadhyay M.K.^, Roy S.B.^, Syamaprasad U. Effect of combined addition of nano-SiC and nano-Ho₂O₃ on the in-field critical current density of MgB₂ superconductor *Journal of Applied Physics, Vol. 107, p. 013907, Jan. 2010. Morrison K., Barcza A., Moore J. D. , Sandeman K. G., Chattopadhyay M.K.^, Roy S.B.^, Caplin A. D. and Cohen L. F. The magnetocaloric performance in pure and mixed magnetic phase CoMnSi Journal of Physics D: Applied Physics, Vol. 43, p. 195001, Apr. 2010. Sharath Chandra L. S., Chattopadhyay M.K.^, Sharma V.K.^, Roy S.B.^, Pandey S. K. Temperature dependence of thermoelectric power and thermal conductivity in ferromagnetic shape memory alloy Ni₅₀Mn₃₄In₁₆ in magnetic fields *Physical Review B, Vol. 81, p. 195105, May. 2010. Sharma V.K.^, Chattopadhyay M.K.^, Roy S.B.^ Large magnetocaloric effect in Ni₅₀Mn_33.66Cr_0.34In₁₆ alloy *Journal of Physics D: Applied Physics, Vol. 43, p. 225001, May. 2010. Chattopadhyay M.K.^, Roy S.B.^* Disorder influenced magnetic phase transition in the Ce(Fe_0.9Ru_0.1)₂ alloy *Journal of Physics: Condensed Matter, Vol. 22, p. 236002, May. 2010. 2009* Roy S.B.^, Chattopadhyay M.K.^ Contrasting the magnetic response between a magnetic glass and a reentrant spin glass *Physical Review B, Vol. 79, p. 052407, 2009. Mondal P.^, Manekar M.A.^, Srivastava A.K.^, Roy S.B.^* Bulk critical state and fundamental length scales of superconducting nanocrystalline Nb₃Al in Nb-Al matrix *Physical Review B, Vol. 80, p. 024502, Jul. 2009. Arora P.^, Tiwari P.^, Sathe V. G., Chattopadhyay M.K.^ Magnetocaloric effect in DyCu₂ *Journal of Magnetism and Magnetic Materials, Vol. 321, p. 3278, Jul. 2009. Chattopadhyay M.K.^, Arora P.^, Roy S.B.^ Magnetic properties of the field-induced ferromagnetic state in MnSi *Journal of Physics: Condensed Matter, Vol. 21, p. 296003, Jul. 2009. Sharma V.K.^, Chattopadhyay M.K.^, Chouhan A.^, Roy S.B.^* Temperature and magnetic field induced strain in Ni₅₀Mn₃₄In₁₆ alloy *Journal of Physics D: Applied Physics, Vol. 42, p. 185005, Sep. 2009. Roy S.B.^, Myneni G. R., Sahni V.C.^* The influence of chemical treatments on the superconducting properties of technical niobium materials and their effect on the performance of superconducting radio frequency cavities *Superconductor Science and Technology, Vol. 22, p. 105014, Sep. 2009. Arora P.^, Chattopadhyay M.K.^, Roy S.B.^ Magnetic properties and large magnetocaloric effect of DyPt₂ *Journal of Applied Physics, Vol. 106, p. 093912, Nov. 2009. Sharma V.K.^, Moore J. D., Chattopadhyay M.K.^, Morrison K., Cohen L. F., Roy S.B.^ A scanning Hall probe imaging study of the field induced martensite–austenite phase transition in Ni₅₀Mn₃₄In₁₆ alloy *Journal of Physics: Condensed Matter, Vol. 22, p. 016008, Dec. 2009. 2008* Mondal P.^, Manekar M.A.^, Kumar R.^, Ganguli T.^, Roy S.B.^* Superconducting properties of nanocrystalline Nb₃Al in Nb–Al matrix *Applied Physics Letters, Vol. 92, p. 052507, 2008. Chattopadhyay M.K.^, Sharma V.K.^, Roy S.B.^ Thermomagnetic history dependence of magnetocaloric effect in Ni₅₀Mn₃₄In₁₆ *Applied Physics Letters, Vol. 92, p. 022503, 2008. Chattopadhyay M.K.^, Roy S.B.^* Metamagnetic transition and the anomalous virgin magnetization curve in Ce(Fe_0.96Ru_0.04)₂ *Journal of Physics: Condensed Matter, Vol. 20, p. 025209, 2008. Manekar M.A.^, Roy S.B.^* Nucleation and growth dynamics across the antiferromagnetic to ferromagnetic transition in (Fe_0.975Ni_0.025)₅₀Rh₅₀: analogy with crystallization *Journal of Physics: Condensed Matter, Vol. 20, p. 325208, 2008. Manekar M.A.^, Roy S.B.^* Thermomagnetic history effects across the first order magneto-structural transition in the giant magnetocaloric Fe-Rh alloy *European Physical Journal B, Vol. 64, p. 19, 2008. Chattopadhyay M.K.^, Roy S.B.^, Morrison K., Moore J. D. , Perkins G. K. , Cohen L. F. , Gschneidner jr. K. A., and Pecharsky V. K. Visual evidence of the magnetic glass state and its re-crystallization in Gd₅Ge₄ Europhysics Letters, Vol. 83, p. 57006, 2008. Manekar M.A.^, Roy S.B.^* Reproducible room temperature giant magnetocaloric effect in Fe–Rh *Journal of Physics D: Applied Physics, Vol. 41, p. 192004, 2008. Naik S. R. , Rai S.K.^, Chattopadhyay M.K.^, Sharma V.K.^, Majumdar S., Lodha G.S.^* Structural and transport properties of ferromagnetically coupled Fe/Si/Fe trilayers *Journal of Applied Physics, Vol. 104, p. 063525, 2008. Moore J. D., Perkins G. K., Morrison K., Ghivelder L., Chattopadhyay M.K.^, Roy S.B.^, Chaddah P.^, Gschneidner K. A. Jr., Pecharsky V. K., Cohen L. F. Local probing of arrested kinetics in Gd₅Ge₄ *Journal of Physics: Condensed Matter, Vol. 20, p. 465212, 2008. Sharma V.K.^, Chattopadhyay M.K.^, Roy S.B.^ Studies on the field-induced martensite to austenite phase transition in Ni₅₀Mn₃₄In₁₆ *Journal of Physics: Condensed Matter, Vol. 20, p. 425210, 2008. Roy S.B.^, Myneni G.R., Sahni V.C.^* On the reliable determination of the magnetic field for first flux-line penetration in technical niobium material *Superconductor Science and Technology, Vol. 21, p. 065002, 2008. Roy S.B.^, Chaddah P.^, Pecharsky V. K., Gschneidner K. A. Jr. Overview No. 145 Metamagnetic transitions, phase coexistence and metastability in functional magnetic materials Acta Materialia, Vol. 56, p. 5895, 2008. Gupta P, Sokhey K. J. S., Rai S., Choudhary R. J., Phase D. M., Lodha G. S. Pulsed laser ablated off-stoichiometric thin films of the Heusler alloy Co₂TiSn on Si (100) substrate *Thin Solid Films* Vol 517, p. 3650, 2008 2007 Sharma V.K.^, Chattopadhyay M.K.^, Roy S.B.^* Large inverse magnetocaloric effect in Ni50Mn₃₄In_16, *Journal of Physics D: Applied Physics, Vol. 40, p. 1869-1873, 2007. Arora P.^, Chattopadhyay M.K.^, Roy S.B.^ Magnetocaloric Effect in MnSi *Applied Physics Letters, Vol. 91, p. 062508, 2007. Sharma V.K.^, Chattopadhyay M.K.^, Roy S.B.^ Kinetic arrest of the first order austenite to martensite phase transition in Ni₅₀Mn₃₄In₁₆: dc magnetization studies *Physical Review B: Condensed Matter, Vol. 76, p. 140401, 2007. Sharma V.K.^, Chattopadhyay M.K.^, Kumar R.^, Ganguli T.^, Tiwari P.^, Roy S.B.^* Magnetocaloric effect in Heusler alloys Ni₅₀Mn₃₄In₁₆ and Ni₅₀Mn₃₄Sn₁₆ *Journal of Physics: Condensed Matter, Vol. 19, p. 496207, 2007. Manekar M.A.^, Mukharjee C.^, Roy S.B.^ Imaging of time evolution of the first-order magneto-structural transition in Fe-Rh alloy using magnetic force microscopy *Europhysics Letters, Vol. 80, p. 17004, 2007. Roy S.B.^, Chattopadhyay M.K.^* Low-temperature magnetic response of MnSi: Thermomagnetic history effects, metamagnetic transition and the kinetic arrest of the reverse transition *Europhysics Letters, Vol. 79, p. 47007, Dec. 2007. Sharma V.K.^, Chattopadhyay M.K.^, Kumar R.^, Ganguli T.^, Kaul R.^, Majumdar S., Roy S.B.^* Magnetic and calorimetric investigations of ferromagnetic shape memory alloy Ni₅₄Fe₁₉Ga₂₇ *Journal of Physics D: Applied Physics, Vol. 40, p. 3292, 2007. Gardelis S., Androulakis J., Viskadourakis Z., Papadopoulou E.L., Giapintzakis J., Rai S., Lodha G.S.^, Roy S.B.^* Magneto-transport properties of NiMnSb thin films on InSb single crystal: negative giant magnetoresistence *Physica Status Solidi (A), Vol. 204, p. 92-98, 2007. Roy S.B.^, Chattopadhyay M.K.^, Banerjee A., Chaddah P.^, Moore J.D., Perkins G.K., Cohen L.F., Gschneidner K.A., Pecharsky V.K. Devitrification of the low temperature magnetic-glass state in Gd₅Ge₄ *Physical Review B, Vol. 75, no. 18, p. 184410-1-7, 2007. 2006* Roy S.B.^, Chattopadhyay M.K.^, Chaddah P.^, Moore J.D., Perkins G.K., Cohen L.F., Gschneidner K.A. Jr. Evidence of a magnetic glass state in the magnetocaloric material Gd₅Ge₄ Physical Review B, Vol. 74, no. 1, p. 012403-1-4, Jul. 2006. Roy S.B.^, Chattopadhyay M.K.^, Chaddah P.^ Temperature dependence of magnetization in the superconducting mixed state of CeRu₂: evidence of a first order phase transition *Journal of Physics: Condensed Matter, Vol. 41, no. 18, p. 9471-9482, Oct. 2006. Chattopadhyay M.K.^, Manekar M.A.^, Roy S.B.^ Magnetocaloric effect in CeFe₂ and Ru-doped CeFe₂alloys *Journal of Physics D: Applied Physics, Vol. 39, no. 6, p. 1006-1011, Mar. 2006. Kumar Kranti, Pramanik A.K., Banerjee A., Chaddah P.^, Roy S.B.^, Park S., Zhang C.L., Cheong S.W. Relating supercooling and glass-like arrest of kinetics for phase separated systems: Doped CeFe₂ and (La,Pr,Ca) MnO₃ Physical Review B, Vol. 73, no. 18, p. 184435-6, 2006. Moore J.D., Perkins G.K., Bugoslavsky Y., Chattopadhyay M.K.^, Roy S.B.^, Chaddah P.^, Pecharsky V.K. Reducing the operational magnetic field in the prototype magnetocaloric system Gd5 Ge4 by approaching the single cluster size limit *Applied Physics Letters, Vol. 88, no. 7, p. 072501-1-3, Feb. 2006. Gardelis S., Androulakis J., Viskadourakis Z., Papadopoulou E.L., Giapintzakis J., Rai S.K.^, Lodha G.S.^, Roy S.B.^ Negative giant longitudinal magnetoresistance in NiMnSb/InSb: interface effect *Physical Review B, Vol. 74, no. 21, p. 214427-1-5, 2006. Roy S.B.^, Chattopadhyay M.K.^, Manekar M.A.^, Sokhey K.J.^, Chaddah P.^ First order magneto-structural transition in functional magnetic materials: phase-coexistence and metastability *Bulletin of Materials Science, Vol. 29, no. 6, p. 623-631, Nov. 2006. Sharma V.K.^, Chattopadhyay M.K.^, Shaeb K.H.B., , Chouhan A.^, Roy S.B.^* Large magnetoresistance in Ni₅₀Mn₃₄In₁₆ alloy *Applied Physics Letters, Vol. 89, no. 22, p. 222509, 2006. Rai S.K.^, Tiwari M.K.^, Lodha G.S.^, Modi M.H.^, Chattopadhyay M.K.^, Majumdar S., Gardelis S., Viskadourakis Z., Giapintzakis J., Nandedkar R.V.^, Roy S.B.^, Chaddah P.^* Surface and interface study of pulsed-laser-deposited off-stoichiometric NiMnSb thin films on a Si(100) substrate *Physical Review B, Vol. 73, no. 3, p. 035417-1-5, Mar. 2006. Moore J.D., Perkins G.K., Bugoslavsky Y., Cohen L.F., Chattopadhyay M.K.^, Roy S.B.^, Chaddah P.^, Gschneidner Jr. K.A., Pecharsky V.K. Correlating the local magnetic properties of the magnetic phase transition in Gd₅Ge₄ using scanning Hall probe imaging *Physical Review B: Condensed Matter and Materials Physics, Vol. 73, p. 144426, 2006. 2005* Roy S.B.^, Chattopadhyay M.K.^, Chaddah P.^, Nigam A.K. Sharp magnetization step across the ferromagnetic to antiferromagnetic transition in doped-CeFe₂ alloys Physical Review B, Vol. 71, p. 174413, 2005. Chattopadhyay M.K.^, Roy S.B.^, Chaddah P.^ Supercooling and giant relaxation of disordered vortex state in a doped CeRu₂alloy *Physical Review B:, Vol. 71, no. 2, p. 024523, Jan. 2005. Chattopadhyay M.K.^, Roy S.B.^, Chaddah P.^ Kinetic arrest of the first-order ferromagnetic-to-antiferromagnetic transition in Ce(Fe_0.96Ru_0.04)₂ : Formation of a magnetic glass *Physical Review B, Vol. 72, no. 18, p. 180401-1-4, Nov. 2005. Majumdar S., Chattopadhyay M.K.^, Sharma V.K.^, Sokhey K.J.^, Roy S.B.^, Chaddah P.^ Transport properties of ferromagnetic Heusler alloy Co₂TiSn *Physical Review B:, Vol. 72, no. 1, p. 12417, Jul. 2005. Roy S.B.^, Nigam A.K., Chaddah P.^* Comment on 'Commented review, UCu₂Ge₂ and UCu₂Si₂ compounds with only ferromagnetic ordering' *Journal of Physics: Condensed Matter, Vol. 17, no. 19, p. 3113-3115, May. 2005. Sharma B.K., Purvia V., Ahuja B.L., Sharma M., Chaddah P.^, Roy S.B.^, Kakutani Y., Koizumi A., Nagao T., Omura A., Kawai T., Sakai N. Temperature-dependent magnetic Compton scattering study of spin moments Ce (Fe_0.94Ru_0.06)₂ Physical Review B, Vol. 72, no. 3, p. 132405-1-4, Oct. 2005. Roy S.B.^, Chaddah P.^* First order magneto-structural phase transition in various functional materials *Current Science, Vol. 88, no. 1, p. 71-77, Jan. 2005. Majumdar S., Sharma V.K.^, Manekar M.A.^, Kaul R.^, Sokhey K.J.^, Roy S.B.^, Chaddah P.^* Magnetic and martensitic transitions in Ni-Fe-Ga alloy *Solid State Communications, Vol. 136, no. 2, p. 85-88, 2005. Minakov A.A., Roy S.B.^, Bugoslavsky Y.V., Cohen L.F. Thin-film alternating current nanocalorimeter for low temperatures and high magnetic fields *Review of Scientific Instruments, Vol. 76, no. 4, p. 043906, Apr. 2005. 2004* Branford W.R., Clowes S.K, Bugoslavsky Y.V., Gardelis S., Androulakis J., Giapintzakis J., Grigorescu C.E.A., Manea S.A., Freitas R.S., Roy S.B.^, Cohen L.F. Thickness dependence of Hall transport in Ni_1.15Mn_0.85Sb thin films on silicon Physical Review B, Vol. 69, no. 20, p. R201305, 2004. Nigam A.K., Roy S.B.^ Multiple magnetic transitions in UPd₂Ge₂ *Journal of Magnetism and Magnetic Materials, Vol. 272-276, no. 1, p. E325-E326, 2004. Sokhey K.J.^, Chattopadhyay M.K.^, Nigam A.K., Roy S.B.^, Chaddah P.^* Signatures of phase separation across the disorder broadened first order ferromagnetic to antiferromagnetic transition in doped-CeFe₂alloys *Solid State Communications, Vol. 129, no. 1, p. 19-23, Jan. 2004. Chattopadhyay M.K.^, Manekar M.A.^, Pecharsky A.O., Pecharsky V.K., Gschneidner K.A. Jr., Moore J., Perkins G.K., Bugoslavsky Y.V., Roy S.B.^, Chaddah P.^, Cohen L.F. Metastable magnetic response across the anti-ferromagnetic transition in Gd₅Ge₄ Physical Review B, Vol. 70, no. 21, p. 214421, 2004. Roy S.B.^, Perkins G. K., Chattopadhyay M.K.^, Nigam A. K. , Sokhey K.J.^, Chaddah P.^, Caplin A. D., Cohen L. F. First order magnetic transition in doped CeFe₂ alloys: Phase coexistence and metastability Physics Review Letters, Vol. 92, p. 147203, 2004. Branford W.R., Roy S.B.^, Clowes S.K, Miyoshi Y., Bugoslavsky Y.V., Gardelis S., Giapintzakis J., Cohen L.F. Spin polarization and anomalous Hall effect in NiMnSb films *Journal of Magnetism and Magnetic Materials, Vol. 272-276, no. 1, p. E1399-E1401, 2004. Roy S.B.^, Chaddah P.^* Experimental study of disorder-influenced first-order transitions in vortex matter and in magnetic systems *Phase Transitions, Vol. 77, p. 767, 2004. Branford W.R., Clowes S.K., Syed M.H., Bugoslavsky Y.V., Gardelis S., Androulakis J., Giapintzakis J., Grigorescu C.E.A., Berenov A.V., Roy S.B.^, Cohen L.F. Large positive magnetoresistance in nonstoichiometric NiMnSb thin films on silicon *Applied Physics Letters, Vol. 84, no. 13, p. 2358-2360, Mar. 2004. 2003* Chattopadhyay M.K.^, Roy S.B.^, Nigam A.K., Sokhey K.J.^, Chaddah P.^ Metastability and giant relaxation across the ferromagnetic to antiferromagnetic transition in Ce(Fe_0.96Ru_0.04)₂ *Physical Review B: Condensed Matter, Vol. 68, p. 174404, 2003. Roy S.B.^, Radzyner Y., Giller D., Wolfus Y., Shaulov A., Chaddah P.^, Yeshurun Y. Possibility of Kauzmann points in the vortex matter phase diagram of single crystal YBa₂Cu₃O_7−δ Physica C, Vol. 390, p. 56, 2003. Sokhey K.J.^, Manekar M.A.^, Chattopadhyay M.K.^, Kaul R.^, Roy S.B.^, Chaddah P.^* Magnetic and Transport Properties of (β+γ) Ni₃₅Co₃₅Al₃₀ Alloy across the Martensitic Transition *Journal of Physics D: Applied Physics, Vol. 36, p. 1366-1370, 2003. 2002* Sokhey K.J.^, Chaudhary S.^, Chattopadhyay M.K.^, Manekar M.A.^, Roy S.B.^, Chaddah P.^ First-order transition from ferromagnetism to antiferromagnetism in Ce(Fe_0.96Al_0.04)₂ : a magnetotransport study *Physical Review B, Vol. 65, p. 094419, 2002. Chattopadhyay M.K.^, Roy S.B.^, Chaudhary S.^ Interesting magnetic properties of Fe_1-xCo_xSi *Physical Review B, Vol. 65, p. 132409, 2002. Ahuja B.L., Ramesh T., Sharma B.K., Chaddah P.^, Roy S.B.^, Kakutani Y., Koizumi A., Hiraoka N., Toutani M., Sakai N., Sakurai Y., Itou M. Temperature dependent magnetic Compton scatterring study of spin moments in Ce(Fe_0.96Ru_0.04)₂ Physical Review B, Vol. 66, p. 012411, 2002. Chattopadhyay M.K.^, Roy S.B.^, Chaudhary S.^, Sokhey K.J.^, Nigam A.K. Magnetic response of Fe_1-xCo_xSi alloys: A detailed study of magnetization and magnetoresistance Physical Review B, Vol. 66, p. 174421, 2002. Manekar M.A.^, Chaudhary S.^, Chattopadhyay M.K.^, Sokhey K.J.^, Roy S.B.^, Chaddah P.^* Metamagnetic transition in Ce(Fe_0.96Al_0.04)₂ : a dc magnetisation study *Journal of Physics: Condensed Matter, Vol. 14, p. 4477, 2002. Chaudhary S.^, Sokhey K.J.^, Roy S.B.^, Chaddah P.^* Fluctuation effects and scaling behavior in C15 Laves-phase superconductor CeRu₂ *Physica C, Vol. 377, p. 130, 2002. Roy S.B.^, Chaudhary S.^, Chattopadhyay M.K.^, Chaddah P.^, sampathkumaran V. Interesting thermomagnetic history effects in the antiferromagnetic state of SmMn₂Ge₂ Journal of Physics: Condensed Matter, Vol. 14, p. 9779, 2002. Chaudhary S.^, Chattopadhyay M.K.^, Sokhey K.J.^, Roy S.B.^, Chaddah P.^, E.V. Sampathkumaran Thermomagnetic history effects in SmMn₂Ge₂ *Physical Review B, Vol. 66, p. 014424, 2002. Sokhey K.J.^, Chaudhary S.^, Chattopadhyay M.K.^, Roy S.B.^* Anomalous magnetic transition and thermomagnetic irreversibility in polycrystalline neodymium *Solid State Communications, Vol. 121, p. 543, 2002. Sokhey K.J.^, Chaudhary S.^, Chattopadhyay M.K.^, Roy S.B.^* Thermomagnetic irreversibility in rare earth neodymium *Journal of Magnetism and Magnetic Materials, Vol. 246, p. 260, 2002. 2001* Manekar M.A.^, Chaudhary S.^, Chattopadhyay M.K.^, Sokhey K.J.^, Roy S.B.^, Chaddah P.^ First order transition from antiferromagnetism to ferromagnetism in Ce(Fe_0.96Al_0.04)₂ *Physical Review B, Vol. 64, p. 104416, 2001. Chaddah P.^, Roy S.B.^* Vortex matter and its phase transitions *Current Science, Vol. 80, p. 1036, 2001. Chaudhary S.^, Rajarajan K.^, Sokhey K.J.^, Roy S.B.^, Chaddah P.^ Peak effect in vortex state of V₃Si: a study of history dependence *Physica C, Vol. 353, p. 29, 2001. Chaddah P.^, Manekar M.A.^* Calculation of minor hysteresis loops under metastable to stable transformations in vortex matter. *PRAMANA, Vol. 56, p. 657, 2001. 2000* Manekar M.A.^, Roy S.B.^, Chaddah P.^* First-order transition from ferromagnetism to antiferromagnetism in CeFe₂-based pseudobinary alloys *Journal of Physics: Condensed Matter, Vol. 12, p. L409, 2000. Manekar M.A.^, Chaudhary S.^, Chattopadhyay M.K.^, Sokhey K.J.^, Roy S.B.^, Chaddah P.^* First order metamagnetic transition in CeFe₂-based pseudobinary alloys *Journal of Physics: Condensed Matter, Vol. 12, p. 9645, 2000. Radzyner Y., Roy S.B.^, Giller D., Wolfus Y., Shaulov A., Chaddah P.^, Yeshurun Y. Metastable vortex-states in YBa₂Cu₃O_7-x crystal Physical Review B, Vol. 61, p. 14362, 2000. Roy S.B.^, Chaudhary S.^, Chaddah P.^ Peak effect in CeRu₂ : History dependence and Supercooling *Physical Review B, Vol. 62, p. 9191, 2000. Chaddah P.^, Roy S.B.^* Supercooling across first order phase transition in vortex matter *PRAMANA, Vol. 54, p. 857, 2000. Chaudhary S.^, Roy S.B.^, Chaddah P.^, Babu P. K., Nagarajan R., Gupta L. C. Peak effect in the superconducting mixed state of bulk Mo-Re alloys: a dc magnetization study *Philosophical Magazine, Vol. 80, p. 1393, 2000. Chaddah P.^, Chaudhary S.^, Roy S.B.^, Babu P. K., Nagarajan R., Gupta L. C Are history effects common to all Peak effects in Superconductors? *Solid* *State* *Communication, Vol. 115, p. 445, 2000. Chaudhary S.^, Rajarajan K.^, Sokhey K.J.^, Roy S.B.^, Chaddah P.^ History dependence of Peak Effect in CeRu₂ and V₃Si: an analogy with random field Ising system *Solid State Communication, Vol. 114, p. 5, 2000. 1999* Roy S.B.^, Chaddah P.^ Interesting normal state and superconducting properties of the intermetallic valence compound CeRu₂ *PRAMANA, Vol. 53, p. 659, 1999. Chaddah P.^, Roy S.B.^* Supercooling across first-order phase transitions induced by density variation *Physical Review B, Vol. 60, p. 11926, 1999. Nigam A. K., Roy S.B.^, Chaddah P.^* Magnetoresistance in a well-annealed sample of UCu₂Ge₂ *Physical Review B, Vol. 60, p. 3002, 1999. Roychaudhuri P. , Sheshagri K., Taneja P. , Bandopadhyay S., Ayyub P., Nigam A. K., Pinto R., Chaudhary S.^, Roy S.B.^* Spin polarized tunelling in the half-metallic ferromagnets La_0.7-xHo_xSr_0.3MnO₃ (x=0 and x=0.15): experiment and theory *Physical Review B, Vol. 59, p. 8440, 1999. Chaddah P.^, Roy S.B.^, Chandran M. On inferring equilibrium magnetization from hysteretic M-H curves Physical Review B, Vol. 59, p. 8440, 1999. Roy S.B.^, Chaudhary S.^, Chaddah P.^, Cohen L. F. Anomalous magnetization in the superconducting mixed state of CeRu₂: a study with vibrating sample magnetometer *Physica C, Vol. 322, p. 115, 1999. Chaudhary S.^, Roy S.B.^, Chaddah P.^ Orientation induced crossover in pinning force density and peak effect in Bi₂Sr₂CaCu₂O_8+y single crystals *Physica C, Vol. 311, p. 122, 1999. Roy S.B.^, Chaddah P.^* Sample dependence of the normal state magnetic properties in CeRu2 and possible correlations with the anomalous superconducting response *Physica B, Vol. 262, p. 20, 1999. Chaudhary S.^, V. S.K.^, Roy S.B.^, Chaddah P.^, Krishnakumar S. R. , Sathe V. G. , Kumar A., Sarma D. D. Magnetocaloric effect in La_1-xSr_xCoO₃ Journal of Magnetism and Magnetic Materials, Vol. 202, p. 45, 1999. Chaudhary S.^, Roy S.B.^, Chaddah P.^, Delong L.E. On the anomalous pinning properties of the C-15 Laves phase superconductor CeRu₂ *Superconductor Science and Technology, Vol. 12, p. 308, 1999. Roy S.B.^, Chaddah P.^, Chaudhary S.^ Nonequilibrium behaviour in the field-cooled magnetization of the C15 Laves-phase superconductor CeRu₂ *Solid State Communication, Vol. 109, p. 427, 1999. Chaudhary S.^, Roy S.B.^, Chaddah P.^ Anomalous peak-effect in CeRu₂: effect of disorder *Solid State Communication, Vol. 111, p. 263, 1999. 1998* Roy S.B.^, Chaddah P.^, Chaudhary S.^* The anomalous mixed state of the C15 Laves phase superconductor CeRu₂: a magnetization study *Journal of Physics: Condensed Matter, Vol. 10, p. 4885, 1998. Roy S.B.^, Chaddah P.^, DeLong L.E. Possibility of a first order transition in the magnetization study of the anomalous superconducting mixed state of CeRu₂ Physica C, Vol. 304, p. 43, 1998. Roy S.B.^, Chaddah P.^, Chaudhary S.^ Anomalous mixed state of the C15-Laves phase superconductor CeRu₂ II: history dependence in the field-cooled magnetization hysteresis *Journal of Physics: Condensed Matter, Vol. 10, p. 8327, 1998. Chandran M Effect of linear defects on the field distribution in thin superconductors Physical Review B* Vol. 57 p. 3609, 1998. Chandran M Field distribution in thin superconductors with a secondary peak in magnetisation *Physica C* Vol. 304, p. 202, 1998. 1997 Rajarajan A.K., Roy S.B.^, Chaddah P.^ Magnetic Instability in CeFe₂: Effect of Re and Ir substitutions *Physical Review B, Vol. 56, p. 7808, 1997. Roy S.B.^, Chaddah P.^* Study of minor hysteresis loops in the usual and anomalous superconducting regime of Ce_0-95Nd_0.05)Ru₂ : evidence of a first-order transition *Physica C, Vol. 279, p. 70, 1997. Roy S.B.^, Pradhan A.K.^, Chaddah P.^, Sampathkumaran E.V. The thermomagnetic irreversibility and metamagnetic behaviour of DyCu₂Si₂ *Journal of Physics: Condensed Matter, Vol. 9, p. 2465, 1997. Pradhan A.K.^, Roul B.K., Roy S.B.^, Chaddah P.^, Kanjilal D., Chen C., Wanklyn B.M. Effects of grain boundaries and columnar defects on magnetic hysteresis of Bi₂Sr₂CaCu₂O₈ +y crystals *Solid State Communications, Vol. 101, p. 367, 1997. Roy S.B.^, Chaddah P.^* Anomalous superconducting response in CeRu₂ and (Ce_0.95Nd_0.05) Ru₂: evidence of a first order transition *Journal of Physics: Condensed Matter, Vol. 9, p. L 625, 1997. Roy S.B.^, Chaddah P.^* Anomalous superconducting properties in CeRu₂: effects of magnetic and non-magnetic substitutions *Physical Review B, Vol. 55, p. 11100, 1997. Bhagwat K V and Chaddah P New theoretical designs for dipole magnetics *Particle Accelerators* Vol. 56, p. 147, 1997. Bhagwat K. V. and Chaddah P* Flux penetration in thin superconducting films with field-dependent critical current density *Physica C* Vol. 280, p. 52., 1997. Chandran M Positive moment of an inductively coupled Josephson junction array *Physical Review B* Vol. 56., p. 6169., 1997. Chandran M Critical state in thin superconductors: a Josephson junction array analogy *Physica C* Vol. 289., p. 22., 1997. Chandran M Field distribution in thin superconductors: Effect of sample shape *Physica C* Vol. 292., p. 147., 1997. Roy S. B., Chaddah P., and Pradhan A. K. CeRu₂: A novel f-electron system with interesting normal state and superconducting properties Indian Journal of Pure and Applied Physics. Vol. 35., p. 682., 1997. Roy S. B., Pradhan A. K., Chaddah P* and Park J. G. Magnetic irreversibility and a marginal phase transition in UCu₂Ge₂ Philosophical Magazine B. Vol. 75., p. 303., 1997. 1996 Roy S.B.^, Pradhan A.K.^, Chaddah P.^, Park J.G. Magnetic irreversibility and a marginal phase transition in UCu₂Ge₂ Philosophical Magazine, 1996. Pradhan A.K.^, Roy S.B.^, Chaddah P.^, Kanjilal D., Chen C., Wanklyn B.M. Effect of 200 MeV Ag-ion irradiation on magnetisation in a Bi₂Sr₂CaCu₂O_8+y single crystal *Physical Review B, Vol. 53, p. 2269, 1996. Pradhan A.K.^, Roy S.B.^, Chaddah P.^, Kanjilal D., Chen C., Wanklyn B.M. Flux pinning by columnar defects in Bi₂Sr₂CaCu₂O_8+y single crystals *Physica C, Vol. 264, p. 109, 1996. Mukherjee S., Ranganathan R., Roy S.B.^ AC susceptibility study of Ce(Fe_0.9Al_0.1)₂ *Solid State Communications, Vol. 98, p. 321, 1996. Roy S.B.^, Hussain Z., Pradhan A.K.^, Chaddah P.^, Nagarajan R., Gupta L.C. Anomalous temperature dependence of H_c2 in YNi₂B₂C *Physica C, Vol. 256, p. 90, 1996. Roy S.B.^, Pradhan A.K.^, Chaddah P.^, Coles B.R. Interesting magnetic properties of UCu₂Si₂ *Solid State Communications, Vol. 99, p. 563, 1996. Roy S.B.^, Pradhan A.K.^, Chaddah P.^ Metastable magnetic response in UT₂X₂ compounds with ThCr₂Si₂ structure *Physica B, Vol. 223-224, p. 198, 1996. Pradhan A.K.^, Roy S.B.^, Chaddah P.^, Kanjilal D., Chen C., Wanklyn B.M. Peak effect and magnetization minima in Bi₂Sr₂CaCu₂O₈ single crystals *Superconductor Science and Technology, Vol. 9, p. 743, 1996. Roy S.B.^, Pradhan A.K.^, Chaddah P.^ On the anomalous magnetic properties of superconducting CeRu₂ *Physica C, Vol. 271, p. 181, 1996. Roy S.B.^, Chaddah P.^* Unusual superconducting phenomenon in CeRu₂: effect of Nd substitutions *Physica C, 1996. Chandran M and Chaddah P Critical state in a Josephson Junction array: effect of transport currents *Physica C* Vol. 267, p. 59., 1996. 1995 Roy S.B.^, Pradhan A.K.^, Chaddah P.^* Magnetic anomaly and the peak effect in superconducting CeRu₂ *Physical Review B, Vol. 52, p. R9847, 1995. Roy S.B.^ Comments on Note on the magnetism of Ucu₂Ge₂ *Philosophical Magazine B, Vol. 71, p. 105, 1995. Ocko M., Miljak M., Kos I., Roy S.B.^ Thermopower of (Ce,Pr)Cu₆ alloys *Journal of Physics: Condensed Matter, Vol. 7, p. 2979, 1995. Roy S.B.^, Pradhan A.K.^, Chaddah P.^ Effect of sample shape on the low-field magnetisation peak in a C15 Laves phase superconductor *Physica C, Vol. 253, p. 191, 1995. Roy S.B.^, Kumar S.^, Pradhan A.K.^, Chaddah P.^, Prasad R.^, Soni N.C., Adhikari K. A study of the harmonic generation and minor hysteresis loops in granular samples of Bi-2223: a comparison with YBaCuO *Superconductor Science and Technology, Vol. 8, p. 155, 1995. Roy S.B.^, Pradhan A.K.^, Chaddah P.^ Metastable magnetic response of UCu₂Ge₂ *Philosophical Magazine, Vol. 71, p. 97, 1995. Mahendiran R., Raychaudhuri A.K., Chainani A., Sarma D.D., Roy S.B.^ Large magnetoresistance in La_1-xSr_xMnO₃ and its dependence on magnetization *Applied Physics Letters, Vol. 66, p. 233, 1995. Pradhan A.K.^, Roy S.B.^, Chaddah P.^, Chen C., Wanklyn B.M. Magnetic properties of Y_1-xPr_xBa₂Cu₃O_7-y crystals: magnetization and irreversibility line *Physica C, Vol. 245, p. 238, 1995. Roy S.B.^, Pradhan A.K.^, Chaddah P.^, Coles B.R. Magnetic relaxation in UCu₂Ge₂ *Physica B, Vol. 206-207, p. 498, 1995. Pradhan A.K.^, Roy S.B.^, Kumar S.^, Chaddah P.^, Prasad R., Soni N.C. H_c1 measurements using hysteresis in magneto resistance of sintered YBaCuO Applied Superconductivity, Vol. 2, p. 223, 1995. Pradhan A.K.^, Roy S.B.^, Chaddah P.^, Chen C., Wanklyn B.M. Anomalous magnetic behaviour of Bi₂Sr₂CaCu₂O₈ single crystals near the superconducting transition regime *Physical Review B, Vol. 52, p. 6215, 1995. Batham P., Roy S.B.^, Kumar S.^, Pradhan A.K.^, Grover A.K., Chaddah P.^, Prasad R., Soni N.C. Geometry effect on the non-linear magnetic response of Yba₂Cu₃O₇ Pramana: Journal of Physics, Vol. 45, p. 261, 1995. Pradhan A.K.^, Roy S.B.^, Chaddah P.^, Kanjilal D., Chen C., Wanklyn B.M. Effects of heavy-ion irradiation on the magnetic anomaly in Bi₂Sr₂CaCu₂O₈ crystal near the transition temperature *Physica C, Vol. 254, p. 281, 1995. Bhagwat K. V. and Chaddah P Flux penetration in thin elliptic superconducting cylinders subjected to transverse fields Physica C Vol. 254, p. 143 1995. Chandran M and Chaddah P* Low-field ac magnetization of granular high-Tc superconductors *Superconductor Science and Technology. Vol.8., p. 774., 1995. Pradhan A. K, Chen C and Wanklyn B M High-magnetic field transport properties and irreversibility line of single crystal (2212) and ceramics of BPSCCO (2223) *Physica C* Vol. 251, p. 405, 1995. Kumar S, Shah P and Gupta A Hysteresis in thermal properties of CuO and YBa₂Cu₃O_7-x Ferroelectrics* Vol. 165., p. 231 1995. 1994 Nigam A. K., Roy S.B.^, Chandra G. Ferromagnetic-to-antiferromagnetic transition in Ucu₂Ge₂: magnetoresistance study Physical Review B, Vol. 49, p. 1127, Jul. 1994. Roy S.B.^, Coles B.R. Anomalous magnetization of superconducting CeRu₂ *Journal of Physics: Condensed Matter, Vol. 6, p. L663, 1994. Pradhan A.K.^, Roy S.B.^, Chaddah P.^, Chen C., Wanklyn B.M. Anomalous low field magnetic properties of single crystal BSCCO *Physica C, Vol. 235-240, p. 1947, 1994. Chaddah P.^, Roy S.B.^, Kumar S.^, Pradhan A.K.^, Prasad R., Soni N.C. Granularity effects in the AC magnetisation of ceramic superconductors Indian Journal of Pure and Applied Physics, Vol. 32, p. 541, 1994. Roy S.B.^, Pradhan A.K.^, Chaddah P.^ Anomalous low-field magnetic behaviour of polycrystalline URu₂Si₂ *Journal of Physics: Condensed Matter, Vol. 6, p. 253, 1994. Roy S.B.^, Pradhan A.K.^, Chaddah P.^ Possibility of a magnetic transition in ZrV₂ *Solid* *State* *Communications, Vol. 91, p. 227, 1994. Pradhan A.K.^, Roy S.B.^, Chaddah P.^, Chen C., Wanklyn B. M. Magnetic properties of single-crystal Bi₂Sr₂CaCu₂O_8+y : experimental evidence of a dimensional crossover *Physical Review B, Vol. 49, p. 12984, 1994. Pradhan A.K.^, Roy S.B.^, Chaddah P.^, Chen C., Wanklyn B.M. Magnetic anomaly in Y_1-xPr_xBa₂Cu₃O_7-y crystals *Physica C, Vol. 225, p. 369, 1994. Roy S.B.^, Pradhan A.K.^, Chaddah P.^ Magnetic properties of polycrystalline UNi₂Ge₂: irreversibility and metastable behaviour *Journal of Physics: Condensed Matter, Vol. 6, p. 5155, 1994. Roy S.B.^, Pradhan A.K.^, Chaddah P.^ Study of magnetic relaxation in the C15 superconductor CeRu₂ *Superconductor Science and Technology, Vol. 7, p. 602, 1994. Roy S.B.^, Hussain Z., Pradhan A.K.^, Majumdar Chandan, Chaddah P.^, Nagarajan R., Goddart C., Gupta L.C. Magnetization studies in YNi₂B₂C *Physica C, Vol. 228, p. 319, 1994. Mukherjee S., Ranganathan R., Roy S.B.^ Linear and nonlinear ac susceptibility of the canted-spin system: Ce(Fe_0.96Al_0.04)₂ *Physical Review B, Vol. 50, p. 1084, 1994. Radha S., Roy S.B.^, Nigam A.K., Chandra G. Magnetoresistance measurements in Ce(Fe_0.92Al_0.08)₂ *Physical Review B, Vol. 50, p. 6866, 1994. Pradhan A.K.^, Roy S.B.^, Chaddah P.^, Chen C., Wanklyn B.M. Fluctuation phenomena in excess conductivity and magnetization of single crystal Bi₂Sr₂CaCu₂O_8+y *Physical Review B, Vol. 50, p. 7180, 1994. Pradhan A.K.^, Chaddah P.^, Roy S.B.^, Chankang C. Magnetic anomaly in Pb₂Sr₂Y_1-xCa_xCu₃O_8+y single crystal *Superconductor Science and Technology, Vol. 7, p. 372, 1994. Bhagwat K V, Nair S. V. and Chaddah P Mutually perpendicular magnetic fields parallel to a slab: a test case for the critical state model *Physica C* Vol. 227., p. 176., 1994. Bhagwat K. V. and Chaddah P. Flux penetration in spheroid samples - critical state model with field dependent critical current density Physica C* Vol. 224., p. 155., 1994. 1993 Pradhan A.K.^, Roy S.B.^, Kumar S.^, Chaddah P.^, Prasad R., Soni N.C., Adhikary K. H_c1 measurements in sintered YBaCuO and Bi(Pb) SrCaCuO using remanent second harmonc generation *Physica C, Vol. 216, p. 169, 1993. Roy S.B.^, Kumar S.^, Pradhan A.K.^, Chaddah P.^, Prasad Ram, Soni N.C. Study of minor hysteresis loops of YBaCuO: dc and ac hysteresis effects in granular samples Physica C, Vol. 218, p. 476, 1993. Kumar S.^, Roy S.B.^, Pradhan A.K.^, Chaddah P.^, Prasad R., Soni N.C. Second harmonic generation as a sensitive technique for estimating H_c1 of high T_c materials Journal of Applied Physics, Vol. 73, p. 1539, 1993. Roy S.B.^, Kumar S.^, Pradhan A.K.^, Chaddah P.^, Prasad R., Soni N.C., Adhikary K. Field-cooled measurements of harmonic generation in magnetisation of high-Tc superconductors Pramana: Journal of Physics, Vol. 41, p. 51, 1993. Pradhan A. K., Hazell S.J., Hodby J.W., Chen C., Hu Y. and Wanklyn B.M.. Magnetoresistance and upper critical fields in single crystal Y_1-xPr_xBa₂Cu₃O_7-y *Solid State Communications. Vol. 86., p. 199, 1993. Kumar Shaliendra On the use of a photothermal technique for measuring thermal parameters of YBa₂Cu₃O_7-X *Applied Physics A* Vol. 57., p. 87, 1993. Kumar Shailendra, Pai S P, Pinto R and Kumar D Effect of thermal cycling on normal state properties of YBa₂Cu₃O_7-X films Physica C* Vol. 215, p. 286., 1993. Pradhan A. K., Roul B K, Rao V V and Kalvey V R Transport and magnetic properties of YBCO/Ag composites Cryogenics* Vol. 33., p. 910., 1993. Pradhan A. K., Hazell S J, Hodby J W, Chen C, Chowdhury A J S and Wanklyn B M Observation of negative magnetoresistance in single crystal Y_1-XPr_XBa₂Cu₃O₇ , Solid State Communications. Vol. 88., p. 723, 1993. Pradhan A. K., Hazella S J, Hodby J W, Chen C, Hu Y and Wanklyn B M Dissipative behaviour in single crystal Y_0.85Pr_0.15Ba₂Cu₃O_7-Y *Physica CVol. 218., p. 208., 1993. 1992* Roy S.B.^, Kumar S.^, Chaddah P.^, Prasad R., Soni N. C. Magnetic field dependence of the harmonic generation in sintered pellets of YBaCuO: The history effects Physica C, Vol. 198, p. 383, 1992. Pradhan A. K., Roy S.B.^, Changkang C., Wanklyn B. M. , Hodby J. W., Caplin A. D. Magnetic properties of Pb₂Sr₂Y_1-xCa_xCu₃O_8+y superconductors Physica C, Vol. 197, p. 22, 1992. Roy S.B.^, Sim K. E., Caplin A. D. The insulator-metal transition in Si-Na clathrate compounds : a search for superconductivity *Philosophical Magazine, Vol. 65, p. 1445, 1992. Roy S.B.^ CeRu₂ and ZrV₂: two interesting Laves phase superconductors *Philosophical Magazine, Vol. 65, p. 1437, 1992. Kumar S.^, Roy S.B.^, Chaddah P.^, Prasad R., Soni N.C. History effect in harmonic generation in sintered pellets of YBaCuO *Physica C, Vol. 191, p. 450, 1992. Chakravarti A., Ranganathan R., Roy S.B.^ Competing interactions and spin-glass like features in UCu₂Ge₂ system *Physical Review B, Vol. 46, p. 6236, 1992. Chaddah P.^, Roy S.B.^, Kumar S.^, Bhagwat K.V. Minor hysteresis loop and harmonic generation calculation in a generalised critical-state model *Physical Review B*, Vol. B46, p. 11737, 1992.

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