Effect of tetravalent titanium ions substitution on the dielectric properties of Co-Zn ferrites

A series of polycrystalline spinel ferrites with composition Co0.4Zn0.6+xTixFe2-2xO4, (X = 0.1, 0.2, 0.3, and 0.4) were prepared by the standard ceramic method to study the effect of Ti ions substitution on their AC electrical conductivity and dielectric properties at different frequencies and temperatures. It was found that the electrical conductivity decreases as Ti ions substitution increases. The results of electrical conductivity were explained on the basis of the polaron conduction mechanism. The results of the dielectric constant and dielectric loss were explained with the aid of Rezlescu model and Koops phenomenological theory. (C) 2002 Elsevier Science B.V. All rights reserved.