Subhash Thota

Subhash Thota

Position
Associate Professor
Location
Department of Physics, IIT Guwahati
Room No: 8
Subhash Thota is a member of the following research group and research areas:

Research areas

  • Material Science and Engineering; Magnetic Nanostructures, High-k Dielectrics, Oxide Heterostructures, Superlattices, Magnetocaloric Effects, Relaxor ferroelectrics, Semimagnetic semiconductors, Bandgap Engineering.

Superlattices & Heterostructures : Interlayer coupling in multilayers, Magneto-transport properties, Multiferroics, and Half metals Magnetocaloric Effect : Magnetic Cooling in multi-layer thin-film and Mixed valence compounds Nanostructures : Controlled synthesis and characterization of nanometer size magnetic and magnetic-semiconductors Band-gap Engineering : III-V, II-V, IV-VI groups based binary, ternary and Quaternary compound semiconductors Ferroelectrics and High-k Dielectrics : KNN based Relaxor-Ferroelectric oxides and ZrO2 based high k-dielectrics

Highlighted publications

  1. Journals

    • P. Pramanik, D. C. Joshi, N. Tiwari, T. Sarkar, S. Pittala, O.O. Salman, M.M. Manga and S. Thota"Cationic distribution, exchange interactions, and relaxation dynamics in Zn-diluted MnCo2O4 nanostructures ", Journal of Applied Physics (AIP) vol.125, no. , pp.124302-1-11, [2019 ]

    • S. Ghosh, R. G. Tanguturi, P. Pramanik, D. C. Joshi, P. K. Mishra, S. Das, and S. Thota"Low-temperature anomalous spin correlations and Kondo effect in ferromagnetic SrRuO3/LaNiO3/La0.7Sr0.3MnO3trilayers ", Physical Review B (APS) vol.99, no. , pp.115135-1-11, [2019 ]

    • R. T. George, T. A. Dar, D. C. Joshi, V. Sathe, A. K. Rathore and S. Thota"Thermal hysteresis and vibrational excitations in NiO containing NaNbO3 ", Journal of Physics D: Applied Physics (IOP) vol.52, no. , pp.115301-1-10, [2019 ]

    • D. C. Joshi, P. Pramanik, M. K. Warshi, S. Ghosh, A. Meher, K. Dasari and S. Thota"Role of phase transition in the dielectric and magnetic properties of Na containing NiO ", Journal of Physics and Chemistry of Solids (Elsevier) vol.130, no. , pp.154-164, [2019 ]

    • R.T George, D.C Joshi, S. Nayak, N. Tiwari, R.N Chauhan, P. Pramanik, T. A Dar, S. Ghosh, S. Thota"Effect of NiO substitution on the structural and dielectric behaviour of NaNbO3", AIP vol.123, no. , pp.54101, [2018]

    • S. Ghosh, S. Singh, D. C. Joshi, P. Pramanik, S. Ghosh, P. K. Mishra and S.Thota"Role of dilution on the electronic structure and magnetic ordering of spinel cobaltites", Physical Review B (APS) vol.98, no. , pp.235119-1-14, [2018]

    • S. Thota, K. Roychowdhury, V. Thakare, S. C. Ganguli, Z. H. Chen, E. J. Guo and S. Das"Structural and magnetic properties of La0.7Sr0.3MnO3/LaCoO3heterostructures", Applied Physics Letters (AIP) vol.113, no. , pp.122405-1-5, [2018 ]

    • S. Das, S. Ghosh, P. Pramanik, D. C. Joshi and and S. Thota"Interfacial magnetism in LaSrMnO3/LaNiO3 ultrathin superlattices", Journal of Physics D: Applied Physics (IOP) vol.51, no. , pp.325001-1-6, [2018 ]

    • P. Pramanik, S. Singh, D. C. Joshi, A. Mallick, K. Pisane, A. H. Romero, S. Thota and M. S. Seehra"Cubic phase stability, optical and magnetic properties of Cu-stabilized zirconia nanocrystals", Journal of Physics D: Applied Physics (IOP) vol.51, no. , pp.225304-1-12, [2018 ]

    • RT George, DC Joshi, S Nayak, N Tiwari, RN Chauhan, P Pramanik, TA Dar, S Ghosh, S Thota"Effect of NiO substitution on the structural and dielectric behaviour of NaNbO3 ", Journal of Applied Physics, AIP vol.123, no. , pp.54101, [2018]

    • D. C. Joshi, P. Pramanik, R. T. George, T. Sarkar and S. Thota"Nature of magnetic ordering in nanocomposites of Zn1-pNipO and NiO", Physica E: Low-dimensional Systems and Nanostructures (Elsevier) vol.103, no. , pp.46-52, [2018 ]

    • R. Padam, T. Sarkar, R. Mathieu, S. Thota and D. Pal"Magnetic phase diagram of Co(Cr1-xAlx)2O4", Journal of Applied Physics vol.122, no.7, pp.73908, [2017]

    • S. Thota, S. Ghosh, S. Nayak, D. C. Joshi, P. Pramanik, K. Roychowdhury and S. Das "Finite-size-scaling and Exchange-Bias in SrRuO3/LaNiO3/SrRuO3 Trilayers", Journal of Applied Physics vol.122, no.12, pp.124304, [2017]

    • K. Singh, K. Kumar, S. Nayak, D.C. Joshi, M.M. Alom, S. Thota and A. Chowdhury "Structural and Dielectric Properties of the Fluorite-Type LaxCe1-xO2-δ Ceramics", Journal of Physics D: Applied Physics (IOP) vol.50, no.49, pp.495601, [2017]

    • S. Singh, P. Pramanik, S. Sangaraju, A. Mallick, L. Giebeler and S. Thota "Size-dependent structural, magnetic and optical properties of MnCo2O4 nanocrystallites", Journal of Applied Physics vol.121, no.19, pp.194304, [2017]

    • P. Pramanik, S. Thota, S. Singh, D. C Joshi, B. Weise, A. Waske and M. S. Seehra "Effects of Cu doping on the electronic structure and magnetic properties of MnCo2O4 nanostructures", Journal of Physics: Condensed Matter vol.29, no.42, pp.425803, [2017]

    • D.C. Joshi, P. Pramanik, S. Nayak, K. Dasari, R. J. Choudhary and S. Thota "Magnetic exchange interactions and dielectric studies of Zn1–xNixO-NiO composites", Journal of Physics D. Applied Physics vol.50, no.32, pp.325002, [2017]

    • S Thota, M Reehuis, A Maljuk, A Hoser, JU Hoffmann, B Weise, A Waske, M. Krautz, D. C. Joshi, S. Nayak, S. Ghosh, P. Suresh, K. Dasari, S. Wurmehl, O. Prokhnenko, B. Büchner"Magnetic compensation, field-dependent magnetization reversal, and complex magnetic ordering in Co2TiO4 ", Physical Review B, APS vol.96, no. , pp.144104, [2017]

    • R. Soni, R. George, D. C. Joshi, S. Nayak, P. Pramanik, P. Suresh, T. A. Dar, S. Thota"Dielectric Properties of (1-x)KNbO3–xNiO Two-Phase Composites", Journal of Physics D: Applied Physics, IOP vol.50, no. , pp.415305, [2017]

    Conferences

    • S. Thota, D. C. Joshi, S. Das, S.Nayak and P. Pramanik"Effect of substrate induced strain on the structural and magnetic ordering of Pr0.7Ca0.3MnO3/SrTiO3superlattices grown by Pulsed Laser Deposition", 5thInternational Conference on Magnetic Materials and Applications (ICMAGMA-2017) vol., no. , pp. , [February 1-3, 2017]

    • D. C. Joshi, T. Sarkar, S. Nayak, P. Pramanik, S. Das, and S. Thota"Magnetic Properties of Zn1-xNixO/NiO two-phase Nanocomposites", 5thInternational Conference on Magnetic Materials and Applications (ICMAGMA-2017) vol., no. , pp. , [February 1-3, 2017 ]

    • S. Nayak, D. C. Joshi, P. Pramanik, A.Banerjee, and S. Thota"Tunable Exchange-Bias and Magnetic Compensation Temperature of Two-Phase Spinel composites of (1-x)(Co3O4)+x(Co2TiO4)", 5thInternational Conference on Magnetic Materials and Applications (ICMAGMA-2017) vol., no. , pp. , [February 1-3, 2017 ]

    • P. Pramanik, D. C. Joshi and S. Thota"Optical and Magnetization studies MnCo2-pCupO4 Ferrimagnetic Spinels", International Conference on Advanced Functional Materials (ICAFM 2017) vol., no. , pp. , [Dec.18-20, 2017]

    • S. Ghosh, S. K. Jena, D. C. Joshi, P. Pramanik, P. K. Mishra and S. Thota"Density Functional Theory Studies of Mg doped NiO", University of Delhi, India vol., no. , pp.OL70-197, [2018 (Dec.16-20)]

    • P. Pramanik, D. C. Joshi, S. Ghosh, T. A. Dar, R. T. George and S. Thota"Vibrational Excitations in Ferrimagnetic Spinel MnCo2O4", National Workshop on Fluorescence and Raman Spectroscopy vol., no. , pp. , [2017]

    • S. Biswas, D. C. Joshi, T. Nagendrababu, P. Pramanik, S. Ghosh, T. A. Dar and S. Thota"High Frequency Dielectric Studies of Sodium Doped Mott-Insulators", 5th International Conference on Advanced Nanomaterial and Nanotechnology (ICANN-2017) vol., no. , pp. , [2017]

    • T. A. Dar, D. C. Joshi, R. T. George and S.Thota"High temperature Dielectric behavior of KNaNbO3 and CuO composites", 5th International Conference on Advanced Nanomaterial and Nanotechnology (ICANN-2017) vol., no. , pp. , [2017]

    • S. Nayak, R. Soni, R.T. George, T.A. Dar, D. C. Joshi and S. Thota "On the Vibrational Excitations in Ferroelectric KNbO3 and Antiferromagnetic MgMnO3 Composites", 5th International Conference on Advanced Nanomaterial and Nanotechnology (ICANN-2017) vol., no. , pp. , [2017]

    • S. Ghosh, S. Nayak, P. K. Mishra and S. Thota"Structural and Magnetic properties of Al doped Cobalt Orthotitanate", 5th International Conference on Advanced Nanomaterial and Nanotechnology (ICANN-2017) vol., no. , pp. , [2017]

    • D. C. Joshi, P. Pramanik and S. Thota"The role of Na doping on the Antiferromagnetic ordering of NiO", International Conference on Advanced Functional Materials (ICAFM 2017) vol., no. , pp. , [2017]

    • T. A. Dar, D. C. Joshi, S. Nayak, R. T. George, S. Ghosh and S. Thota"Structural and Micro-Raman studies of Ferroelectric KNaNbO3 and CuO composites", National Workshop on Fluorescence and Raman Spectroscopy vol., no. , pp. , [2017]

    • P. Pramanik, D. C. Joshi and S. Thota "Ferrimagnetic behavior and Optical properties of MnCo2-pCupO4 ", Nanostructures National Conference on Nanomaterials and its Applications (NCNA-17) vol., no. , pp. , [2017]

    • D. C. Joshi, P. Pramanik, T. Nagendrababu and S. Thota"Electronic structure and Dielectric studies of Na doped NiO", National Conference on Nanomaterials and its Applications (NCNA-17) vol., no. , pp. , [2017]

    • R.Soni, R.George, D.C.Joshi, P.Pramanik, S.Nayak, S.Ghosh, S.Thota"Lead-free Ferroelectric KNbO3-NiO Two Phase Composite", Research Conclave,2017 vol., no. , pp. , [2017]

    • R.George, D.C.Joshi, R.Soni, P.Pramanik, S.Nayak, S.Thota"Dielectric Behavior of lead-free Ferroelectric NaNbO3-NiO Two phase Composite", Research Conclave,2017 vol., no. , pp. , [2017]

    • Sobhit Singh, M. S. Seehra, P. Pramanik and S. Thota "Finite-Size effects in the Optical and Magnetic Properties of MnCo2O4 Nanostructures", American Physical Society vol., no. , pp. , [ March 13–17, 2017]

    • A. Meher, A. Thakur, D.C. Joshi, P.Pramanik, S. Thota"Morphotropic Phase Boundary Engineering and Dielectric Excitations in NaNbO3-MgMnO3 Composites", Research Conclave-2017 vol., no. , pp. , [ 8-11 March 2017]

    • A. Thakur, P.Pramanik, D. C Joshi, A. Meher, S. Thota"High Temperature Dielectric Behavior of Spin-1/2 Frustrated Kagome Magnet Co3V2O8", Research Conclave-2017 vol., no. , pp. , [ 8-11 March 2017 ]

    • D. C. Joshi, S. Nayak, P. Pramanik, R. George, R. Soni, K. Dasari and S. Thota"X-ray Photoelectron Spectroscopic Studies of Na Doped NiO", National Seminar on Advances In Material Science vol., no. , pp. , [ 24-25, March , 2017]

    • S.Nayak, J. Dhillon, S. K. Deshpande, D.C. Joshi, P. Pramanik , R. George, and S. Thota"Dynamic ac-Conductivity Studies of Cobalt-Orthotitanate ", National Seminar on Advances In Material Science vol., no. , pp. , [ 24-25, March , 2017]

    • P. Pramanik, S. Ghosh, D. C. Joshi, S. Nayak, and S. Thota "Structural, Magnetic, Micro-Raman and Electron Spin Resonance Studies of MnCo2O4Bulk and Nanostructures ", National Seminar on Advances In Material Science vol., no. , pp. , [ 24-25, March , 2017]

    • R. George, R. Soni, D. C. Joshi, S. Nayak, P. Pramanik, S.Ghosh, and S. Thota"Thermal Hysteresis in NaNbO3-NiO Two-Phase Composites ", National Seminar on Advances In Material Science vol., no. , pp. , [ 24-25, March , 2017]

    • R. Soni, D. C. Joshi, S. Nayak, P. Pramanik, R. George, S.Ghosh and S. Thota "On the nature of diffused first-order phase transition in NaNbO3-MnO2 two-phase composites ", National Seminar on Advances In Material Science vol., no. , pp. , [ 24-25, March , 2017 ]

    • S. Biswas, D. C. Joshi, S. Ghosh, S. Thota, P. Mishra "Molecular dynamic simulation studies of thermal diffusion of lithium and lithium based alloys", MRSI symposium on Advances in Functional and Exotic Materials AFEM 2018 vol.2, no.40, pp.28, [ 14-16 Feb 2018]

    • T.A. Dar, D.C. Joshi, S. Nayak, R.T. George, S. Ghosh , S. Thota"High frequency ac-electrical transport studies of ferroelectric KNaNbO3 and CuO composites", International Conference on Systems and Processes in Physics, Chemistry and Biology (ICSPPCB- 2018) vol., no. , pp. , [ 1-3 March, 2018]

    • R.T. George, T.A. Dar, D.C. Joshi, S. Nayak, S. Thota"Structural and ac-electrical transport of Anti-ferroelectric NaNbO3 and NiO composites", International Conference on Systems and Processes in Physics, Chemistry and Biology (ICSPPCB- 2018) vol., no. , pp. , [ 1-3 March, 2018 ]

    • S. Ghosh, S. Singh, P.K. Mishra, S. Thota"Density Functional Theory Studies of Co-based Spinels", International Conference on Systems and Processes in Physics, Chemistry and Biology (ICSPPCB- 2018) vol., no. , pp. , [ 1-3 March, 2018 ]

    • R. George, R.Soni, D.C. Joshi, P.Pramanik, S.Nayak, S.Pittala and S. Thota"A dynamical study of lead-free KNaNbO3-MnO2", International Conference on Nanomaterials and Nanotechnology vol., no. , pp. , [ 01 - 03 March, 2017]

    • R.Soni, R. George, D.C. Joshi, P. Pramanik, S. Nayak and S. Thota"Mott Variable-Range Hopping Conduction Mechanism in Ferroelectric KNbO3-NiO", International Conference on Nanomaterials and Nanotechnology vol., no. , pp. , [ 01 - 03 March, 2017 ]

    • P. Pramanik, S. K. Singh, R. Soni, D. C. Joshi, S. Nayak and S. Thota"Quantum-size effects in MnCo2O4 Nanocrystals", International Conference on Nanomaterials and Nanotechnology vol., no. , pp. , [ 01 - 03 March, 2017 ]

    • S. Nayak, D. C. Joshi, P. Pramanik and S. Thota"Synthesis and Characterization of MgCo2O4 Nanorods for Fuel Cell Applications", International Conference on Nanomaterials and Nanotechnology vol., no. , pp. , [ 01 - 03 March, 2017 ]

    Text book/Book chapters

    • Subhash Thota and Sobhit Singh"Chapter 4: Nature of Magnetic Ordering in Cobalt-Based Spinels, of Magnetic Spinels – Synthesis, Properties and Applications", InTech vol., no. , pp. , [ March 2017]

    Link to all publications

Postdoctoral Fellow

0 results


Current Research Scholar

SAYANDEEP GHOSH

SUCHIT KUMAR JENA

Dokala Ravi Kiran

Sahona Das

MARUTHI R


Completed Research Scholar

DR. DEEP CHANDRA JOSHI

DR. SANJIB NAYAK

DR. ROBIN T GEORGE

DR. PRATIVA PRAMANIK

Completed Postdoctoral Fellow

Dr. Tanveer Ahmad Dar
[ May, 2018 ]