Specialization

Condensed Matter Physics

Email

sdtiwari@thapar.edu

Biography

S.D. Tiwari is an Associate Professor in Department of Physics and Materials Science. He joined the Department in 2006 as an Assistant Professor after completing his Ph.D. degree from Indian Institute of Technology, Kanpur.

Research Projects:

Title: Effect of Magnetic Anisotropy and Particle Size Distribution on the Magnetization of Antiferromagnetic NiO Nanoparticles

Funding Agency: CSIR, India

Period: 2014-17

Publications

• Superparamagnetic behavior of non-interacting antiferromagnetic ferritin nanoparticles, Navneet Kaur and S. D. Tiwari, Journal of Physics and Chemistry of Solids 185, 111746 (2024).

• Temperature variation of surface magnetization in antiferromagnetic six lines ferrihydrite nanoparticles, Chandni Rani and S. D. Tiwari, Journal of Magnetism and Magnetic Materials 587, 171341 (2023). 

• Magnetic Properties of Two-Line Ferrihydrite Nanoparticles, Chandni Rani and S. D. Tiwari, Physica Status Solidi B 259, 2200251 (2022).

• Evidence for spin-glass freezing in NiO nanoparticles by critical dynamic scaling, Navneet Kaur and S. D. Tiwari, Journal of Superconductivity and Novel Magnetism 34, 1545 (2021).

• Role of wide particle size distribution on magnetization, Navneet Kaur and S. D. Tiwari, Applied Physics A 126, 349 (2020).

• Thermal decomposition of ferritin core, Navneet Kaur and S. D. Tiwari, Applied Physics A 125, 805 (2019).

• Role of particle size distribution and magnetic anisotropy on magnetization of antiferromagnetic nanoparticles, Navneet Kaur and S. D. Tiwari, Journal of Physics and Chemistry of Solids 123, 279 (2018).

• Magnetic properties of undoped and Al doped layered alpha-Co(OH)₂, Anu Gupta and S. D. Tiwari, Physica B 525, 21 (2017).

• Phase transitions in two lines ferrihydrite nanoparticles, Chandni Rani and S. D. Tiwari, Applied Physics A 123, 532 (2017).

• Superparamagnetic behavior of antiferromagnetic six lines ferrihydrite nanoparticles, Chandni Rani and S. D. Tiwari, Physica B 513, 58 (2017).

• Nature of magnetic interactions in beta-Co(OH)₂ nanoparticles, Anu Gupta, S. D. Tiwari and Devendra Kumar, Physica Status Solidi B 253, 1795 (2016).

• Estimation of particle concentration in a nanocomposite using magnetization data, Chandni Rani, S. D. Tiwari and Devendra Kumar, IEEE Transactions on Magnetics 51, 6001005 (2015).

• Estimation of particle magnetic moment distribution for antiferromagnetic ferrihydrite nanoparticles, Chandni Rani and S. D. Tiwari, Journal of Magnetism and Magnetic Materials 385, 272 (2015).

 Description of Research Interests

We are working on magnetic properties of nanoparticles of oxides and hydroxides of iron, nickel and cobalt.