Cation distribution and electromagnetic properties of spinel type Ni–Cd ferrites Original Research Article

Polycrystalline samples with the stoichiometric composition having the general formula Ni1−xCdxFe2O4 where x=0.0–0.8, in step of 0.1, have been prepared using conventional double sintering ceramic method. The X-ray diffraction analysis revealed that the samples crystallize in a single-phase cubic spinel structure. Lattice parameter increases linearly with increasing Cd concentration obeying Vegardʹs law. It is observed that the saturated magnetization increases with the increase of Cd content initially and then decreases thereafter. The composition for x=0.7 and 0.8 shows monotonous increase of magnetization with increasing magnetic field with no sign of saturation. Permeability increases with increasing Cd concentration as well as increasing sintering temperature for all the studied samples. Room temperature DC resistivity decreases with Cd content and sintering temperature.