AC and DC electrical conductivity, dielectric and magnetic properties of Co_(0.65)Zn_(0.35)Fe_(2-x)Mo_xO_4 (x = 0.0,0.1 and 0.2) ferrites

摘要

Cobalt-Zinc ferrites are an important material for designing multiferroic composite. The Mo (4d-tran-sition metal) doped Cobalt-Zinc ferrites are synthesized using ceramic (solid-state reaction) method. Investigation of detailed ac and dc electrical conductivity, dielectric and magnetic properties of Co_(0.65)Zn_(0.35)Fe_(2-x)Mo_xO_4 (x = 0.0, 0.1 and 0.2) spinel ferrites have been reported here. The recorded XRD pattern confirms the formation of inverse spinel structure of the material. The dielectric dispersion has been studied in detail and the existence of non-Debye type relaxation behavior has been confirmed. The dielectric tangent loss is found to be very small at high frequency. The ac conductivity follows the correlated barrier hopping like model. Also the conduction process can be best explained on the basis of Verwey-de Boer mechanism. Magnetic phase transition of the material is estimated from magnetization vs. temperature plots.