Effect of Zn substitution on the structural and magnetic properties of Ni-Co ferrites

Raju, K and Venkataiah, G and Yoon, DH (2014) Effect of Zn substitution on the structural and magnetic properties of Ni-Co ferrites. In: CERAMICS INTERNATIONAL, 40 (7, A). pp. 9337-9344.

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Abstract

A series of ferrite samples with the compositional formula, Ni0.5Co0.5-xZnxFe2O4 (0 <= x <= 0.5), was prepared using the citrate based sol gel method for the better understanding of zinc doping on the structural and magnetic properties. The Rietveld-refined X-ray diffraction data revealed that the samples are having cubic structure with the Fd-3m space group. The lattice parameter increased linearly with increasing Zn content. The surface morphology and stoichiometric ratio of the compositional elements were analyzed by scanning electron microscopy equipped with energy dispersive spectroscopy (EDS). EDS showed that the elemental ratios were stoichiometric. An examination of the magnetic properties revealed an increase in saturation magnetization with increasing Zn concentration up to x=0.3 and a decrease thereafter. These results could be explained using Neel's collinear two-sub-lattice model and three-sub-lattice non-collinear model suggested by Yafet and Kittel. The magnetic cubic anisotropy constant determined by the law of approach to saturation decreased with increasing Zn content. The underlying mechanism behind observed behavior was discussed qualitatively. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

Item Type:	Journal Article
Publication:	CERAMICS INTERNATIONAL
Publisher:	ELSEVIER SCI LTD
Additional Information:	Copyright for this article belongs to the ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
Keywords:	Sol gel method; X-ray diffraction; Magnetic properties; Ferrites
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	12 Jul 2014 15:07
Last Modified:	12 Jul 2014 15:07
URI:	http://eprints.iisc.ac.in/id/eprint/49402

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