Sudhish Kumar
Articles written in Pramana – Journal of Physics
Volume 52 Issue 1 January 1999 pp 111-120
Magnetic structure of (Fe0.97Cr0.03)2P
Sudhish Kumar S K Paranjpe Bipin K Srivastava Anjali Krishnamurthy V C Sahni
Magnetic behaviour of di-metal iron phosphide with a small substitution of iron by chromium, (Fe0.97Cr0.03)2P, has been studied using SQUID magnetometry and powder neutron diffraction. It is paramagnetic at temperatures above ∼180 K with persisting short range ferromagnetic (FM) order. At lower temperatures three different regions of magnetic behaviour are identified. FM order evolves in the region 180 K-120 K but much more slowly and with much less magnetic moments than in Fe2P. In the region 120 K-50 K negative exchange interactions gain some importance leading to a loss of FM order. Below 50 K FM interactions again dominate. Pinning centres influence the behaviour at low temperature up to ∼100 K.
Volume 61 Issue 3 September 2003 pp 617-624
Magnetic behaviour of nano-particles of Fe2.9Zn0.1O4
Subhash Chander Sudhish Kumar Anjali Krishnamurthy Bipin K Srivastava V K Aswal
DC magnetization measurements are reported in the temperature range 20–100 K on a poly-disperse nano-particle sample of the spinel ferrite Fe2.9Zn0.1O4 with a log-normal size distribution of median diameter 43.6 Å and standard deviation 0.58. Outside a core of ordered spins, moments in surface layer are disordered. Results also show some similarities with conventional spin glasses. Blocking temperature exhibits a near linear variation with two-third power of the applied magnetic field and magnetization
Volume 63 Issue 2 August 2004 pp 199-205
Magnetization and neutron diffraction studies on FeCrP
Sudhish Kumar Anjali Krishnamurthy Bipin K Srivastava A Das S K Paranjpe
Crystal structure and magnetic behaviour of FeCrP have been investigated using magnetization and neutron diffraction measurements. FeCrP crystallizes in orthorhombic FeZrP type structure (Pnma space group,
Volume 97, 2023
All articles
Continuous Article Publishing mode
Click here for Editorial Note on CAP Mode
© 2022-2023 Indian Academy of Sciences, Bengaluru.