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Research work presented in International & National conferences

Neutron diffraction study of the inverse spinels Co2TiO4 and Co2SnO4

S. Thota, M. Reehuis, A. Maljuk, et al.
Physical Review B 96(14), 144104 (2017)

Modulation of Peptide Based Nano-Assemblies with Electric and Magnetic Fields

G. Pandey, J. Saikia, S. Sasidharan, D. C. Joshi, S. Thota, H. B. Nemade, N. Chaudhary & V. Ramakrishnan
Nature Scientific Reports, 7, 2726 (2017)

Magnetic phase diagram of Co(Cr1-xAlx)2O4

R. Padam, T. Sarkar, R. Mathieu, S. Thota and D. Pal
Journal of Applied Physics 122(7),073908,(2017) AIP

Finite-size-scaling and Exchange-Bias in SrRuO3/LaNiO3/SrRuO3 Trilayers

S. Thota, S. Ghosh, S. Nayak, D. C. Joshi, P. Pramanik, K. Roychowdhury, and S. Das
Journal of Applied Physics 122, 124304,(2017) AIP

Dielectric Properties of (1-x)KNbO3xNiO Two-Phase Composites

R. Soni, R George, D C Joshi, S Nayak, P Pramanik, P Suresh, T A Dar and S Thota
Journal of Physics D. Applied Physics, 50, 415305 (2017) IOP

Structural and Dielectric Properties of the Fluorite-Type LaxCe1- xO2-d Ceramics

K. Singh, K. Kumar, S. Nayak, D.C. Joshi, M.M. Alom, S. Thota, A Chowdhury
Journal of Physics D. Applied Physics, In-Press (2017) IOP

Size-dependent structural, magnetic, and optical properties of MnCo2O4 nanocrystallites

S. Singh, P. Pramanik, S. Sangaraju, A. Mallick, L. Giebeler, S. Thota
Journal of Applied Physics 121 (19), 194304 (2017)AIP

Effects of Cu doping on the electronic structure and magnetic properties of MnCo2O4 nanostructures

P. Pramanik, S. Thota, S. Singh, D. C Joshi, B. Weise, A. Waske, M. S Seehra
Journal of Physics: Condensed Matter 29 (42), 425803 (2017)IOP

Magnetic exchange interactions and dielectric studies of Zn1–xNixO–NiO composites

D.C. Joshi, P. Pramanik, S. Nayak, K. Dasari, R.J. Choudhary, S.Thota
Journal of Physics D. Applied Physics, 50, 325002 (2017) IOP

Spectroscopic studies of Co2TiO4 and Co3O4 two-phase composites

S. Nayak, K. Dasari, D. C. Joshi, P. Pramanik, R. Palai, V. Sathe, R. N. Chauhan, N. Tiwari and S. Thota
Physica Status Solidi B, 253 (11), 2270 (2016) Wiley

Reentrant spin-glass behavior and bipolar exchange-bias effect in “Sn” substituted cobalt-orthotitanate

S. Nayak, D. C. Joshi, M. Krautz, A. Waske, J. Eckert and S. Thota
Journal of Applied Physics, 119, 043901 (2016) AIP

Peculiarities of the temperature dependence of electron spin resonance and Raman studies of Zn1-xNixO/NiO two-phase nanocomposites

D. C. Joshi, S. Nayak, A. Kumar, A. Mohanta, D. Pamu and S. Thota
Journal of Applied Physics, 119, 074303 (2016) AIP

Magnetic compensation, field-dependent magnetization reversal, and complex magnetic ordering in Co2TiO4

S. Nayak, S. Thota, D. C. Joshi, M. Krautz, A. Waske, A. Behler, J. Eckert, T. Sarkar, M. S. Andersson, R. Mathieu, V. Narang, and M. S. Seehra
Physical Review B, 92, 214434 (2015) APS

Localized charge carrier transport properties of Zn1-xNixO/NiO two-phase composites

D. C. Joshi, K. Dasari, S. Nayak, R. Palai, P. Suresh, S. Thota
Journal of Electronic Materials, 45, 2059 (2016) Springer

The X-ray photoelectron spectroscopy and high-temperature structural studies of Zn1-xNixO/NiO two-phase composites

D. C. Joshi, S. Nayak, P. Suresh, K. S. Suresh, B.V.M. Kumar, S. Thota
Physica Status Solidi (b) ,67, 523 (2015)

On the nature of magnetic state in the spinel Co2SnO4

S. Thota, V. Narang, S. Nayak, S. Sambasivam, B.C. Choi, T. Sarkar, M. S. Andersson, R. Mathieu, and M. S. Seehra
Journal of Physics.: Condensed Matter, 27, 166001 (2015) IOP

Addendum: Co-existence of ferrimagnetism and spin-glass state in the spinel Co2SnO4

S. Thota and M. S. Seehra
Journal of Appled Physics 118, 129901 (2015)

The ac-magnetic susceptibility and dielectric response of complex spin-ordering process in Mn3O4

S. Thota, K. Patyal, S. Nayak, Ch. Simon, J. Kumar and W. Prellier
Journal of Applied Physics 116, 103906 (2014)

The dielectric behavior of Zn1-xNixO/NiO two-phase composites

D. C. Joshi, S. Thota, S. Nayak. D. D. Harish, D. Pamu, Md. Qureshi
Journal of Physics D: Applied Physics 47, 435305 (2014)

Dielectric Response and AC-conductivity Studies of Gd2O3-Contained K0.5Na0.5NbO3 Piezoelectric Ceramics

M. Peddigari, S. Thota, D. Pamu
IEEE Transactions on Dielectrics and Electrical Insulation, 22, 3668 (2015)

Dielectric and ac-conductivity studies of Dy2O3 doped KNaNbO3 ceramics

M. Peddigari, S. Thota, D. Pamu
AIP Advances 4(8), 087113 (2014)

Ion induced secondary electron emission, Optical and hydration resistance behavior of MgO, Mg-Mo-O and Mg-Ce-O thin films

A. Kumar, S. Thota, D. Deva and J. Kumar
Thin Solid Films 556, 260 (2014)

Structural and Dielectric studies of Co doped MgTiO3 thin-films fabricated by RF magnetron sputtering

T. S. Kumar, P. Gogoi, S. Thota, D. Pamu
AIP Advances 4, 067142 (2014)

Size-dependent shifts of the Neel temperature and optical band-gap in NiO nanoparticles

S. Thota, J. H. Shim, and M. S. Seehra
Journal of Applied Physics, 114, 214307, (2013) Letters

Co-existence of ferrimagnetism and spin-glass state in the spinel Co2SnO4

S. Thota, and M. S. Seehra
Journal of Applied Physics, 113, 203905,(2013)

Memory Effects and Relaxation Dynamics of MnCo2O4 Nanocrystallites

S. Thota, S. K. Das, A. Kumar, S. Sangaraju and B. C. Choi
IEEE Transactions on Magnetics, 49, 1020, (2013)

Formation mechanism, Optical and Magneto-dielectric studies of new cubic spinel MgMnO3

S. Thota, K. Singh, B. Prasad, J. Kumar, Ch. Simon and W. Prellier
AIP Advances 02, 032140 (2012)

Synthesis, Structure and Magnetic behaviour of Nanoparticles of Cubic ZnMnO3

J. Rall, S. Thota, J. Kumar, and M. S. Seehra
Applied Physics Letters 100, 252407 (2012)

Synthesis and Optical Characterization of Mg1-xNixO Nanostructures

N. Budiredla, A. Kumar, S. Thota, and J. Kumar
Nanomaterials 10, 5402 (2012)

On the derivation of magnetocaloric properties in ferrimagnetic spinel-Mn3O4

S. Thota, F. Guillou, V. Hardy, A. Wahl, W. Prellier and J. Kumar
Journal of Applied Physics, 109, 053902, (2011)

Magnetic transitions in Mn3O4 and an anomaly at 38 K in magnetization and specific heat

F. Guillou, S. Thota, W. Preellier, J. Kumar and V. Hardy
Physics Review B, 83, 094423, (2011)

Magnetic frustration and short-range ordering in cubic defect spinel MgMnO3

M. S. Seehra, V. Singh and S. Thota
Journal of Applied Physics, 110, 113907, (2011) Letters

Anisotropic magnetocaloric efect in all-ferromagnetic (La0.7Sr0.3MnO3/SrRuO3) superlattices

S. Thota, Q. Zhang,F. Guillou, U. Luders, W. Preellier, A. Wahl and P. Padhan
Applied Physics Letters, 97, 112506 [1-3], (2010)

Synthesis and magnetic properties of nanocrystals of cubic defect spinel MgMnO3

M.S. Seehra, V. Singh, S. Thota, B. Prasad and J. Kumar
Applied Physics Letters, 97, 112507 [1-3], (2010)

Magnetocaloric effect and improved relative cooling power in (La0.7Sr0.3MnO3/SrRuO3) superlattices

Q. Zhang, S. Thota, ,F. Guillou, A. Wahl, P. Padhan, V. Hardy and W. Preellier
J. Phys: Conden. Matter, 23, 052201, (2010) Fast track Communication Citations - 10

Optical, electrical and magnetic properties of Co3O4 nanocrystallites obtained by thermal decomposition of sol–gel derived oxalates

S. Thota, A. Kumar, J. Kumar
Materials Science and Engineering: B, 164, 30-37 (2009)

Ferromagnetic ordering in PLD grown Zn1-xNixO/ZnO bilayer thin films

S. Thota, L.M. Kukreja and J. Kumar
Thin Solid Films, 517, 750-754(2008)

A comparative study of magnetic properties of bulk and nanocrystalline Co3O4

P.Dutta, M.S.Seehra, S.Thota and J.Kumar
Journal of Physics Condesed Matter, 20, 015218[1-8](2008) Citations - 102

Sol-gel synthesis and behaviour of Ni containing ZnO nano-particles

S.Thota and J.Kumar
Journal of Nanoscience and Nanotechnology, 8, 4073-80 (2008)

Preparation, microstructure and optical absorption of NiO thin films

A.K. Srivastava, S. Thota and J. Kumar
Journal of Nanoscience and Nanotechnology, 8, 4111-15 (2008)

Sol- gel synthesis and anomalous magnetic properties of NiO nano-particles

S. Thota and J. Kumar
Journal of Physics and Chemistry of Solids, 68, 1951-64 (2007)

On the sol-gel synthesis and thermal, structural, and magnetic studies of transition metal(Ni, Co, Mn) containing ZnO powders

S. Thota, T. Dutta and J. Kumar
Journal of Physics Condensed Matter, 18, 2473-86 (2006)

Formation and magnetic behaviour of manganese oxide nanoparticles

S. Thota, B. Prasad and J. Kumar
Materials Science and Engineering: B, 167, 153-160 (2010)

Sol-gel synthesis of highly luminesent magnesium oxide nanocrystals

A. Kumar, S. Thota, S. Varma and J. Kumar
Journal of Luminescence, 131, 640 (2010)

Sol-gel synthesis and optical behavior of Mg-Ce-O nanocrystals

A. Kumar, S. Thota, S. Sivakumar, S. Priya and J. Kumar
J. Sol Gel. Sci. Technol. 67, 1047 (2013)

Research work presented in International and National conferences

Finite-Size effects in the Optical and Magnetic Properties of MnCo2O4 Nanostructures

S. Singh, P.Pramanik, M. S. Seehra, and S. Thota
American Physical Society (APS) March 13–17, 2017, New Orleans, Louisiana (USA), Bulletin of the American Physical Society

A dynamical study of lead-free KNaNbO3-MnO2

R. George, R.Soni, D.C. Joshi, P.Pramanik, S.Nayak, S.Pittala and S. Thota
International Conference on Nanomaterials and Nanotechnology (ICNANO-2017), 1-3 March 2017, VBRI-Allahabad, India

X-ray photoelectron spectroscopic studies of Na doped NiO

D. C. Joshi, S. Nayak, P. Pramanik, R. George, R. Soni, K. Dasari and S. Thota
UGC-SAP (DRS III) Sponsored National Seminar on Advances in Materials Science, 24-25 March 2017, Gauhati University, Guwahati-781014, Assam, India.

Mott Variable-Range Hopping Conduction Mechanism in Ferroelectric KNbO3-NiO

R.Soni, R. George, D.C. Joshi, P. Pramanik1, S. Nayak and S. Thota
International Conference on Nanomaterials and Nanotechnology (ICNANO-2017), 1-3 March 2017, VBRI-Allahabad, India

Thermal Hysteresis in NaNbO3-NiO Two-Phase Composites

R. George, R. Soni, D. C. Joshi, S. Nayak, P. Pramanik, S. Ghosh, and S. Thota
UGC-SAP (DRS III) Sponsored National Seminar on Advances in Materials Science, 24-25 March 2017, Gauhati University, Guwahati-781014, Assam, India.

Synthesis and Characterization of MgCo2O4 Nanorods for Fuel Cell Applications

S. Nayak, D. C. Joshi, P. Pramanik and S. Thota
International Conference on Nanomaterials and Nanotechnology (ICNANO-2017), 1-3 March 2017, VBRI-Allahabad, India

On the nature of diffused first-order phase transition in NaNbO3-MnO2 two-phase composites

R. Soni, D. C. Joshi, S. Nayak, P. Pramanik, R. George, S.Ghosh, and S. Thota
UGC-SAP (DRS III) Sponsored National Seminar on Advances in Materials Science, 24-25 March 2017, Gauhati University, Guwahati-781014, Assam, India.

Quantum-size effects in MnCo2O4 Nanocrystals

P. Pramanik, S. K. Singh, R. Soni, D. C. Joshi, S. Nayak and S. Thota
International Conference on Nanomaterials and Nanotechnology (ICNANO-2017), 1-3 March 2017, VBRI-Allahabad, India

Dynamic ac-conductivity studies of Cobalt-Orthotitanate

S.Nayak, J. Dhillon, S. K. Deshpande, D. C. Joshi, P. Pramanik, R. George, and S. Thota
UGC-SAP (DRS III) Sponsored National Seminar on Advances in Materials Science, 24-25 March 2017, Gauhati University, Guwahati-781014, Assam, India.

Ferrimagnetic behavior and Optical properties of MnCo2-pCupO4Nanostructures

P. Pramanik, D. C. Joshi, and S. Thota
National Conference on Nanomaterials and its Applications (NCNA-17), 20-21 Sept, 2017, Golaghat-785621, Assam, India.

Electronic structure and Dielectric studies of Na doped NiO

D. C. Joshi, P. Pramanik, T. Nagendrababu and S. Thota
National Conference on Nanomaterials and its Applications (NCNA-17), 20-21 Sept, 2017, Golaghat-785621, Assam, India.

Low-Temperature anomalous magnetic behavior of TiCo2O4

S. Thota, K. Dasari, S. Nayak, D. C. Joshi, P. Pramanik, A. Waske and T. Sarkar
5th IEEE International Conference on Microwave Magnetics, The University of AlabamaTuscaloosa, 5-8 June, 2016, AL, USA.

Compositional dependence of structural and X-ray photoelectron spectroscopic studies of Zn1-xNixO/NiO Two-Phase Composites

D. C. Joshi, S. Nayak, P. Pramanik, K. Dasari, R. Palai, Md. Qureshi and S. Thota
2nd International Conference on Materials Science and Technology, St. Thomas College Pala Arunapuram, Kottayam, Kerala, India

X-ray Photoelectron Spectroscopy and Optical properties of MnCo2O4 Nanostructures

P. Pramanik, D. C. Joshi, S. Nayak, S Sambasivam, B. C. Choi, and S. Thota
2nd International Conference on Materials Science and Technology, St. Thomas College Pala Arunapuram, Kottayam, Kerala, India

Structural and Magnetic properties of Cu doped Cobalt Orthotitanate

S. Nayak, D. C. Joshi, P. Pramanik, M. Krautz, A. Waske and S. Thota
2nd International Conference on Materials Science and Technology, St. Thomas College Pala Arunapuram, Kottayam, Kerala, India

The localized charge carrier transport properties of Zn1-xNixO/NiO (0.3 < x < 1) two-phase composites

D. C. Joshi, K. Dasari, S. Pittala, S. Nayak and S. Thota
57th Electronic Materials Conference, The Ohio State University, Columbus, Ohio, 24-25 June 2015, USA.

Effect of ‘Na' Doping on the Structural, Dielectric and Electronic Characteristics of Wide Band-Gap NiO (Conference Proceedings)

D. C. Joshi, K. Dasari, S. Nayak, P. Pramanik, P. Suresh, S. Pittala, and S. Thota
9TH WORKSHOP ON FRONTIER IN ELECTRONICS (WOFE-2015) & 2nd WORKSHOP ON MULTIFUNCTIONAL NANOMATERIALS (WMN-15) Dec 15-18, 2015, CARIBE HILTON HOTEL, San Juan, PR, USA

Micro-Raman and Electron Spin Resonance studies of Co3-xTixO4

S. Nayak, D. C. Joshi and S. Thota
2nd International Conference on Nanotechnology ICNT-2015 & Indo-USA joint symposium, Haldia (W.B), India

On the growth mechanism and Electron Spin Resonance studies of cubic-phase ZrO2 nanostructures stabilized with Cu2+

S. Thota, S. Nayak, A. Mallick, D. C. Joshi, S. Sambasivam and Md. Qureshi
2nd International Conference on Nanotechnology ICNT-2015 & Indo-USA joint symposium, Haldia (W.B), India

Growth mechanism and Electron-Spin-Resonance studies of Zn1-xNixO/NiO two-phase nanocomposite (IEEE Xplore Conference Proceedings)

D. C. Joshi, D.D. Harish, D. Roy, S. Nayak, Md. Qureshi, R.L.N. Sai prasad, T. Shiyani, D. Pamu, S. Thota
2nd IEEE International Conference on Emergin Electonics ICEE-2014, 3-6 December-2014, IISc Bangalore, Karnataka (India)

On the cubic phase stability and magnetic properties of Cu doped ZrO2 Bulletin of American Physical Society

S. Thota, K. Pisane, S. Singh, and M.S. Seehra, APS, 3-7 March 2014 Meeting, Denver Colorado (USA)

Effect of Cu doping on the magnetism of MnCo2O4 Cubic spinels Bulletin of American Physical Society

S. K. Singh, M.S. Seehra, and S. Thota, APS, 3-7 March 2014 Meeting, Denver Colorado (USA)

Broadband dielectric studies of Zn1-xNixO/NiO ceramics for varistor device applications

D. Dayapule, P. Mahesh, T.S. Kumar, D. Pamu and S. Thota
6th International conference on Nanoscience and Nanotechnology, Chandigarh, Punjab, India, March 3-5, (2014)

Dielectric spectroscopy of Dy2O3 doped (K0.5Na0.5)NbO3

P. Mahesh, S. Thota and D. Pamu
58th Department of Atomic Energy-Solid State Physics Symposium, Thapar University, India, Dec 17-21, (2013)

The role of surface effects on the optical behavior of nanocrystalline NiO

S. Thota, S. K. Singh, A. Mallick,(AIP Conference Proceedings, 1536, 521 (2013))
International Conference on Recent Trends in Applied Physics & Mat. Sc(RAM), Bikaner, India, Feb 1-2, 2013

Phase evaluation and Optical studies of ZrMnO2 and ZrCoO2 nanocrystallites

S. Thota, A. Ansari, A. Mallick, S. K. Singh, and J. Kumar (AIP Conference Proceedings, 1536, 113 (2013))
International Conference on Recent Trends in Applied Physics and Materials Science (RAM 2013), Bikaner, 1-2-2013

Memory effects and Relaxation dynamics of MnCo2O4

S. Thota, S. K. Das, A. Kumar, S. Sangaraju and B. C. Choi
IEEE International conference on Microwave magnets (ICMM), Kaiserslautern, Germany, Aug 26-29, 2012

Dielectric response of the complex spin ordering process in Mn3O4

S. Thota, K. Singh, D. Pamu, Ch. Simon and W. Prellier
The International conference on Nanoscience and Technology (ICONSAT), Hyderabad, India, Jan 20-23, 2012

Synthesis, structure, and magnetic analysis of the cubic defect spinel ZnMnO3

M. S. Seehra, J. D. Rall, S. Thota and J. Kumar
56 International conference on Magnetism and Magnetic Materials (MMM), Scottsdale, USA, Oct-30, 2011

Effect of annealing on the structural and optical properties of nanocrystalline MgTiO3 thin films

T. S. Kumar, R. K. Bhuyan, S. Thota, A. R. James and D. Pamu
The International conference on Nanoscience and Technology (ICONSAT), Hyderabad, India, Jan 20-23, 2012

Influence of binary mixed phase manganese oxides on the magnetic properties of Mn2O3 nanocrystallites

S. Thota, A. Kumar, T. Shiyani and J. Kumar
2nd International conference on Advanced Nanomaterials and Nanotechnology (ICANN-2011), IIT Guwahati, 8-12-11

Optical and magnetic studies of Zn1-2yNiyCoyO degenerate semi-magnetic semiconductors

S. Thota and J. Kumar AIP Conference Proceedings, 1447, 1047 (2012)
56th DAE-Solid State Physics Symposium, SRM University, India, December 19-23, 2011

Recent Progress in artificial superlattices

U. Luders, A. David, S. Thota, R. Fresard and W. Prellier
Abstracts of the 18th International Vacuum Congress, Beijing, China, August 23-27, 2010

Magnetocaloric effect and enhanced refrigeration efficiency in LaSrMnO3-SrRuO3 superlattices

Q. Zhang, S. Thota, F. Guillou, P. Padhan, V. Hardy, A. Wahl, and W. Prellier
Minerals, Metals and Materials Society AIME 420 commonwealth POBox430 Warrendale PA15086 USA

Magnetic structure and magnetocaloric properties of LaSrMnO3SrRuO3 superlattices

S. Thota, Q. Zhang and W. Prellier
European Materials Research Society (E-MRS) Spring Meeting, Strasburg, France, June 6-11, 2010

Comparative study of MgMoO nanopowders by sol-gel synthesis and solid state reaction

A. Kumar, S. Thota, K. N. Rai and J. Kumar
National conference on recent advances in condensed matter physics, Hamirpur, India, May 23-24, 2009

Magnetic behaviour of Manganese oxide nanoparticles obtained by thermal decomposition of sol-gel derived oxalates

S. Thota, B. Prasad and J. Kumar
Particles Based Advanced Materials, Orlando, USA, May 10-13, 2008

Evidence for Ferromagnetic ordering in PLD grown Zn1-xNixO/ZnO bilayer thin films

S. Thota, L. M Kukreja and J. Kumar
52nd International conference on Magnetism and Magnetic Materials (MMM), Tampa, FL, USA, Nov 4-9, 2007

Characteristics of PLD grown Zn1-xNixO/ZnO bi-layer thin-films

S. Thota, L. M. Kukreja and J. Kumar
4th National symposium on Pulsed Laser Ablation (PLD) of thin films and nanostructures materials meet organized by DAE-BRNS at Rajkot Gujarat, India October 3-5, 2007

Evidence for ferromagnetic ordering in nickel doped ZnO diluted magnetic semiconductor at room temperature

S. Thota, O. P. Singh, T. Dutta, and J. Kumar
International conference on MEMS and Semiconductor Nanotechnology, IIT Kharagpur, 20-23 Dec 2005 (India)