Table of Contents
Conference Papers in Science
Volume 2014 (2014), Article ID 816970, 4 pages
http://dx.doi.org/10.1155/2014/816970
Conference Paper

Study of Magnetic Property of Sn Doped Ni-Zn-Fe Nanoparticles

Department of Physics, University of Petroleum and Energy Studies, Dehradun 248007, India

Received 5 February 2014; Accepted 11 March 2014; Published 9 April 2014

Academic Editors: R. Chandra, P. Mandal, R. K. Shivpuri, and G. N. Tiwari

This Conference Paper is based on a presentation given by B. S. Tewari at “National Conference on Advances in Materials Science for Energy Applications” held from 9 January 2014 to 10 January 2014 in Dehradun, India.

Copyright © 2014 B. S. Tewari et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The ( to ) samples were prepared by solution route technique. These samples were characterized by XRD and EPR spectra at X-band frequency (~9.2 GHz). The XRD spectra of these ferrites confirm the formation of spinel structure. The average particle size calculated by using Scherrer’s formula was found to be of the order of 24.7 nm. The EPR spectra of these ferrites are mainly due to Fe3+ ions. Fe2+ ions have very short spin-lattice relaxation time and therefore EPR spectra of Fe2+ could be observed only at very low temperature. This fact is also supported by the isomer shift values of these ferrites obtained from Mössbauer spectroscopy. The variation of and with Sn4+ concentration is attributed to the variation of superexchange interaction. Moreover in this system the dominant process of relaxation is the spin lattice relaxation rather than the spin-spin interaction.