EFFECTS OF HYPERFINE AND DOPANT CATION INTERACTIONS ON THE DC-ELECTRICAL CONDUCTIVITY OF MNZN FERRITES

Samples of undoped, and CuO, CaO, Al2O3 as well as V2O5 doped MnZn fer rite were prepared using standard ceramic method. The X-ray diffractio n results for the base and doped ferrite samples show a single phase w ith spinel cubic structure. The Mossbauer spectrum of the base sample indicates line broadening and overlapping due to relaxation of magneti c dipoles. The temperature dependence of DC-electrical conductivity ha s been discussed on the basis of electronic conduction (electron hoppi ng) and ionic conduction mechanism.