IMPEDANCE AND MAGNETIZATION STUDIES OF ULTRAFINE NI-ZN FERRITE

Ultrafine Ni0.5Zn0.5Fe2O4 powder was prepared by PVA aided chemical me thod. The powder and sintered pellets were characterised by X-ray diff raction (XRD), vibrating sample magnetometry (VSM), thermogravimetric analysis (TGA) and complex impedance (CI) analysis. The particles are found to be in the size range of 15 to 26 nm for various annealing tem peratures. The coercivity, saturation magnetisation, Neel temperature and electrical conductivity are found to vary with sintering time at 8 00 degrees C for the pellet samples. The variations in the above intri nsic properties are explained qualitatively.