Study of Magnetic Property of Sn Doped Ni-Zn-Fe Nanoparticles. (9th April 2014)

• Record Type: Journal Article
• Authors: Tewari, B. S.; Dhyani, Archana; Joshi, S. K.; Dubey, Santosh; Pandey, Kailash
• Other Names: Chandra R. Academic Editor.; Mandal P. Academic Editor.; Shivpuri R. K. Academic Editor.; Tiwari G. N. Academic Editor.
• Is Part Of: Conference papers in science. Volume 2014(2014)
• Publication Date: 2014-04-09
• Subjects: Science -- Periodicals; Science; Periodicals; 600
• DOI: 10.1155/2014/816970
• Languages: English
• ISSNs: 2356-6108

Abstract

Abstract : The Ni 0.6 + x Zn 0.4 Sn x Fe 2 - 2 x O 4 (x = 0.00 to 0.04 ) 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 Fe 3+ ions. Fe 2+ ions have very short spin-lattice relaxation time and therefore EPR spectra of Fe 2+ 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 g eff and Δ H PP with Sn 4+ 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.