On the dielectric dispersion and absorption in nanosized manganese zinc mixed ferrites

Gopalan, E Veena and Malini, KA and Kumar, D Sakthi and Yoshida, Yasuhiko and Al-Omari, IA and Saravanan, S and Anantharaman, MR (2009) On the dielectric dispersion and absorption in nanosized manganese zinc mixed ferrites. In: nternational Conference on Nanoscience and Nanotechnology, FEB 25-29, 2008, Melbourne, Australia.

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Abstract

The temperature and frequency dependence of dielectric permittivity and dielectric loss of nanosized Mn1-xZnxFe2O4 (for x = 0, 0.2, 0.4, 0.6, 0.8, 1) were investigated. The impact of zinc substitution on the dielectric properties of the mixed ferrite is elucidated. Strong dielectric dispersion and broad relaxation were exhibited by Mn1-xZnxFe2O4. The variation of dielectric relaxation time with temperature suggests the involvement of multiple relaxation processes. Cole-Cole plots were employed as an effective tool for studying the observed phenomenon. The activation energies were calculated from relaxation peaks and Cole-Cole plots and found to be consistent with each other and indicative of a polaron conduction.

Item Type:	Conference Paper
Publication:	JOURNAL OF PHYSICS-CONDENSED MATTER
Publisher:	Institute of Physics
Additional Information:	Copyright of this article belongs to Institute of Physics.
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	14 Dec 2009 10:43
Last Modified:	19 Sep 2010 05:29
URI:	http://eprints.iisc.ac.in/id/eprint/19728

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