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Structural, dielectric and magnetic properties of Ni substituted zinc ferrite

Author:
Kumbhar, S.S.   Mahadik, M.A.   Mohite, V.S.   Rajpure, K.Y.   Kim, J.H.   Moholkar, A.V.   Bhosale, C.H.  


Journal:
Journal of Magnetism and Magnetic Materials


Issue Date:
2014


Abstract(summary):

Ni xZn 1-xFe 2O 4 ferrite has been synthesized by the ceramic method using Ni CO 3, ZnO, Fe 2O 3 precursors. The influence of Ni content on the structural, morphological, electrical and magnetic properties of Ni xZn 1-xFe 2O 4 ferrites is studied. The X-ray diffraction (XRD) analysis reveals that the samples are polycrystalline with spinel cubic structure. The SEM images of Ni xZn 1-xFe 2O 4 ferrite show that the grain size decreases with an increase in the Ni content. The tetrahedral and octahedral vibrations in the samples are studied by IR spectra. Frequency dependence of dielectric constant shows dielectric dispersion due to the Maxwell-Wagner type of interfacial polarization. Conduction mechanism due to polarons has been analyzed by measuring the AC conductivity. Impedance spectroscopy is used to study the electrical behavior. Magnetic properties of Ni xZn 1-xFe 2O 4 are studied by using hysteresis loop measurement. The maximum value of saturation magnetization of 132.8 emu/g obtained for the composition, x=0.8, is attributed to magnetic moment of Fe 3+ ions. [All rights reserved Elsevier].


Page:
114-120


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