Complex Permeability and Transport Properties of Zn Substituted Cu Ferrites

Abstract

Zn doped Cu ferrite of the composition Cu_1-xZn_xFe₂O₄ ferrites for x = 0, 0.1, 0.2, 0.3, 0.4, 0.5,
0.6 prepared by standard double sintering ceramic technique. SEM micrograph of all the samples
revealed that the grain sizes decrease gradually with the increase of Zn content and has great
influence on the magnetic and transport properties. Permeability is found to increase with increase
in Zn content up to x = 0.4 and then slightly decreases with further increase in Zn. The values of
relative quality factor (RFQ) changes with Zn concentration. Room temperature DC resistivity
changes significantly with Zn addition. The variation of the resistivity versus frequency was studied
and the dielectric constant of the system has a variation quite opposite to that of the AC resistivity.
Dielectric constant shows the normal behaviour of the ferrite materials that can be explained by the
interfacial polarization as predicted by Maxwell and Wagner.

Key words: Microstructure; Initial permeability; Dielectric constant; DC resistivity

DOI: 10.3329/jbas.v34i1.5486

Journal of Bangladesh Academy of Sciences, Vol.34, No.1, 1-8, 2010