Faculty Details

Areas of Interest

• Condensed Matter, Experiment: Rare earth intermetallics
• Strongly correlated electron systems
• Magnetic and transport properties of materials at low temperatures

Current Research

Students

Current PhD Students

• PH18D052    MITALI MADHUSMITA PRUSTY
• PH18D059    JESLA P K
• PH19D059    MOHAMMAD RIZWAN AHMAD
• PH20D035    ABHAYA PRASADA MOHAPATRA

Recent Publications

• Enhanced Magnetocaloric effect in Terbium-doped Gadolinium oxide nanoparticles. S. Hazarika, D. Mohanta and R. Nirmala. Condensed Matter. 570. 324. 2019.
• Magnetocaloric effect of Gd2O3 nanorods with 5% Eu-substitution. S. Hazarika, P. S. Behera, D. Mohanta and R. Nirmala. Applied Surface Science. 488C.
  DOI: 10.1016/j.apsusc.2019.05.266. 2019.
• Magnetic and magnetocaloric property studies on nanoparticles of electron-doped manganites R0.15Ca0.85MnO3 (R = Pr and Nd). Sandip Das, T. Kavipriya and R. Nirmala. Materials Research Express. 6. 084010. 2019.
• Crystal Structure and Magnetism of Colossal Dielectric Oxides DyxSr2-xTiMnO6 (x=0‚ 0.5). Rajib Mondal, Kalyan Biswas, Tapas Ghosh, K. Fabitha, M. S. Ramachandra Rao, A. V. Morozkin, A. K. Nigam, S. Quezado, S. K. Malik, and R. Nirmala. Materials Research Express. 6. 016106. 2019.
• Simultaneous magnetic and structural transitions in Nd0.15Ca0.85MnO3 manganite: magnetization and neutron diffraction studies . Lakshman Dhal, Sudhindra Rayaprol, A. V. Morozkin, N. Shukla, T. Geetha Kumary, S. K. Malik, P. N. Santhosh and R. Nirmala . Solid state communications. In press .
  DOI: 10.1016/j.ssc.2019.02.006. 2019.
• Normal and inverse magnetocaloric effect in colossal magnetoresistive electron-doped manganites R0.15Ca0.85MnO3 (R = Y, Gd and Dy) . Lakshman Dhal, Eesha Andharia, N. Shukla, T. Geetha Kumary, A. K. Nigam, S. K. Malik, P. N. Santhosh and R. Nirmala . Journal of Magnetism and Magnetic Materials. 474 . 215.
  DOI: 10.1016/j.jmmm.2018.11.003. 2019.
• Magnetocaloric effect in textured rare earth intermetallic compound ErNi . Aparna Sankar, J. Arout Chelvane, A. V. Morozkin, A. K. Nigam, S. Quezado, S. K. Malik and R. Nirmala . AIP Advances. 8 . 056208. 2018.
• Magnetocaloric effect in melt-spun Laves phase intermetallic compound HoCo2. R. Rajivgandhi, J. Rajesh Krishna, J. Arout Chelvane, S. Quezado, S. K. Malik and R. Nirmala. Journal of Magnetism and Magnetic Materials. 448. 351. 2018.
• Magnetocaloric effect across the metamagnetic transition in Dy5Si2Ge2 Single crystal. R. Nirmala, Chan Ik Lee and Yong Seung Kwon. Journal of Magnetism and Magnetic Materials. 448. 19. 2018.
• On the magnetism and magnetocaloric effect of electron-doped manganite Er0.15Ca0.85MnO3. Moumita Naskar, Sagar Ghorai, S. Prabhakar, R. Rajivgandhi, S. Rayaprol, A. K. Nigam, S. Quezado, S. K. Malik and R. Nirmala. AIP Conference Proceedings. 1942. 130025. 2018.
• Nanogranular, Melt-Spun Intermetallic Compound SmNi: Magnetocaloric Effect and Large Coercivity . Jinu Kurian, J. Arout Chelvane, A. V. Morozkin, A. K. Nigam, S. K. Malik and R. Nirmala . IEEE Transactions on Magnetics. 54. 2103004. 2018.
• Observation of Nd ordering in a novel double perovskite Nd2MgRuO6 with weak exchange interaction at B-site . M. P. Sharannia, Paula Kayser, S Savitha Pillai, Brendan J Kennedy, Maxim Avdeev, R. Nirmala and P. N. Santhosh . Journal of Solid State Chemistry. 259 . 73. 2018.
• Spin glass behavior in frustrated quantum spin system CuAl2O4 with a possible orbital liquid state . R. Nirmala, Kwang-Hyun Jang, Hasung Sim, Hwanbeom Cho, Junghwan Lee, Nam-Geun Yang, Seongsu Lee, R. M. Ibberson, K. Kakurai, M. Matsuda, S.-W. Cheong, V.V. Gapontsev and S.V. Streltsov and Je-Geun Park . Journal of Physics: Condensed Matter. 29 . 13LT01. 2017.
• Effect of rapid quenching on the magnetism and magnetocaloric effect of equiatomic rare earth intermetallic compounds RNi (R = Gd, Tb and Ho . R. Rajivgandhi, J. Arout Chelvane, S. Quezado, S. K. Malik and R. Nirmala. Journal of Magnetism and Magnetic Materials. 433 . 169. 2017.
• Magnetic and magnetocaloric properties of the intermetallic compound ErCu2 . R. Rajivgandhi, J. Arout Chelvane, and R. Nirmala . AIP Conference Proceedings. 1832 . 130059. 2017.
• Metamagnetism-enhanced magnetocaloric effect in the rare earth intermetallic compound Ho5Ge4 . R. Nirmala, A. V. Morozkin, R. Rajivgandhi, A. K. Nigam, S. Quezado and S. K. Malik. Journal of Magnetism and Magnetic Materials. 418 . 118. 2016.
• Observation of magnetization and exchange bias reversals in NdFe0.5Cr0.5O3 . M. P. Sharannia, Santanu De, Ripandeep Singh, A. Das, R. Nirmala and P. N. Santhosh. Journal of Magnetism and Magnetic Materials. 430 . 109. 2016.
• Effect of microstructure and texture on the magnetic and magnetocaloric properties of the melt-spun rare earth intermetallic compound DyNi . R. Rajivgandhi, J. Arout Chelvane, A. K. Nigam, Je-Geun Park, S. K. Malik and R. Nirmala. Journal of Magnetism and Magnetic Materials.
  DOI: 10.1016/j.jmmm.2016.02.052. 2016.
• Magnetocaloric effect in Rare earth intermetallics: Recent trends . R. Nirmala, A. V. Morozkin and S. K. Malik. Pramana – J. Phys.. 84 . 977. 2015.
• Large magnetic entropy change and relative cooling power in the rare earth intermetallic HoCo0.25Ni1.75 compound . Rajib Mondal, R. Nirmala, J. Arout Chelvane and S. K. Malik. Journal of Magnetism and Magnetic Materials. 393 . 376. 2015.
• Bulk and nanocrystalline electron doped Gd0.15Ca0.85MnO3: synthesis and magnetic characterization . Lakshman Dhal, Chattarpal, R. Nirmala, P. N. Santhosh, T. Geethakumary and A. K. Nigam, . Physica B (2014) . In Press.. 2014.
• Magnetic and magnetocaloric properties of rare earth intermetallic compounds HoCo2-xNix (x = 0.75, 1.25) . Rajib Mondal, R. Nirmala, J. Arout Chelvane and A. K. Nigam, . Physica B (2014). In Press.. 2014.
• Magnetocaloric effect in the rare earth intermetallic compounds RCoNi (R = Gd, Tb, Dy and Ho) . Rajib Mondal, R. Nirmala, J. Arout Chelvane and A. K. Nigam . Journal of Applied Physics. 113. 17A930. 2013.
• Magnetic and magnetocaloric properties of rare earth intermetallic compound DyCoNi . Rajib Mondal, J. Arout Chelvane and R. Nirmala. AIP Conference series. 1447. 1115. 2012.
• Size effect on the structural, magnetic, and magnetotransport properties of electron-doped manganite La0.15Ca0.85MnO3 . Rini Thomas, Gangadhar Das, Rajib Mondal, R. Pradheesh, R. N. Mahato, T. Geethakumary, R. Nirmala, A. V. Morozkin, J. Lamsal, W. B. Yelon, A. K. Nigam and S. K. Malik . Journal of Applied Physics (2012) . 111. 07D729. 2012.
• First order transition in Dy5Si3Ge: Transport and thermal properties, and first principles calculations . R. Nirmala, Durga Paudyal, V. K. Pecharsky, K. A. Gschneidner, and A. K. Nigam . Journal of Applied Physics. 109. 07A923. 2011.
• Competing magnetic interactions in the intermetallic compounds Pr5Ge3 and Nd5Ge3 . R. Nirmala, A. V. Morozkin, A. K. Nigam, Jagat Lamsal, W. B. Yelon, O. Isnard, S. A. Granovsky,K. Kamala Bharathi, S. Quezado, and S. K. Malik . Journal of Applied Physics. 109. 07A716. 2011.
• Magnetization and neutron diffraction studies on Sr2TiMnO6 . Jagat Lamsal, Rajib Mondal, Anil Kumar, K. Kamala Bharathi, P. N. Santhosh, R. Nirmala, A. K. Nigam, W. B. Yelon, S. Quezado, and S. K. Malik . Journal of Applied Physics (2011). 109. 07E329. 2011.
• Magnetic properties of Er1−xDyxAl2 (0£x£1) compounds in low applied fields . R. Nirmala, Durga Paudyal, V. K. Pecharsky, and K. A. Gschneidner, Jr. . Journal of Applied Physics (2010) . 107. 09A723. 2010.
• Magnetic transition in the rare earth intermetallic compound Ce5Ge4: Heat capacity and neutron diffraction studies . R. Nirmala, A. V. Morozkin, Jagat Lamsal, W. B. Yelon, and S. K. Malik. Journal of Applied Physics. 107. 09E308. 2010.
• Electric and magnetic polarizabilities of B-site size-disordered hexagonal Ln2CuTiO6 (Ln=Y, Dy, Ho, Er and Yb) . Debraj Choudhury, Adyam Venimadhav, Chandrasekhar Kakarla, Kris T. Delaney, P. Sujatha Devi, P. Mondal, R.Nirmala, J. Gopalakrishnan, Nicola A. Spaldin, Umesh V. Waghmare, D. D. Sarma . Physical Review B (2010). 82. 134203. 2010.
• Unusual dielectric response in B-site disordered hexagonal transition metal oxides . Debraj Choudhury, Adyam Venimadhav, Chandrasekhar Kakarla, Kris T. Delaney, P. Sujatha Devi, P. Mondal, R.Nirmala, J. Gopalakrishnan, Nicola A. Spaldin, Umesh V. Waghmare, D. D. Sarma . Applied Physics Letters. 96. 162903. 2010.
• Understanding the magnetic ground state of rare-earth intermetallic compound Ce4Sb3: Magnetization and neutron diffraction studies . R. Nirmala, A.V. Morozkin, O. Isnard and A.K. Nigam . Journal of Magnetism and Magnetic Material. 321. 188. 2009.
• Magnetic and Magnetocaloric properties of Tb5Si2Sb2 . R. Nirmala, A. K. Nigam and S. K. Malik. Solid State Communications. 146. 121. 2008.
• Tunable magnetocaloric effect in RTi1-xMoxGe (R = Tb, Er) (x = 0, 0.15) Compounds . R. Nirmala and S. K. Malik. Europhysics Letters. 80. 27001. 2007.

Teaching

• 2017 :  (Jan - May) - PH5160 Condensed Matter Physics I; (Jul - Nov) - PH5210 Condensed Matter Physics II / PH5270 Physics Lab III
• 2018 :  (Jan - May) - PH5680 Superconductivity & Its Applications; (Jul - Nov) - PH1010 Physics I / PH5270 Physics Lab III
• 2019 :  (Jan - May) - PH5680 Superconductivity & Its Applications; (Jul - Nov) - PH5270 Physics Lab III / PH5600 Physics At Low Temperatures
• 2020 :  (Jan - May) - PH5680 Superconductivity & Its Applications; (Jul - Nov) - PH5270 Physics Lab III / PH5291 Project I / PH5600 Physics At Low Temperatures
• 2021 :  (Jan - May) - PH5160 Condensed Matter Physics I / PH5240 Viva Voce ; (Jul - Nov) - PH5270 Physics Lab III / PH5600 Physics At Low Temperatures
• 2022 :  (Jan - May) - PH5350 Laboratory for Physical Property Measurement and Transducer / Sensor Element Characteristics of Func / PH5462 Magnetism in Solids ; (Jul - Nov) - PH5270 Physics Lab III / PH5600 Physics At Low Temperatures
• 2023 :  (Jan - May) - PH5160 Condensed Matter Physics I