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

Title
Effect of Zn substitution on the structural and magnetic properties of Ni-Co ferrites
Author(s)
윤당혁카티라주Venkataiah[Venkataiah]
Keywords
NICKEL-ZINC FERRITE; CATION DISTRIBUTION; COBALT FERRITE; GEL METHOD; MOSSBAUER; NANOPARTICLES; ANISOTROPY; MICROSTRUCTURE
Issue Date
201408
Publisher
ELSEVIER SCI LTD
Citation
CERAMICS INTERNATIONAL, v.40, no.7, pp.9337 - 9344
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.
URI
http://hdl.handle.net/YU.REPOSITORY/31301http://dx.doi.org/10.1016/j.ceramint.2014.01.157
ISSN
0272-8842
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공과대학 > 신소재공학부 > Articles
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