Effect of Sm substitution on the magnetic and electrical properties of Cu-Zn ferrite

Samples of the chemical formula Cu_0.5Zn_0.5Fe_2–x Sm_xO₄ where x = 0.0, 0.02, 0.04, 0.06, 0.08 and 0.1 are studied. X-rays analysis indicated that all investigated samples are formed in a single cubic phase. The lattice parameter is found to increase relative to x = 0.0 except x = 0.02. The grain size is decreased for all samples relative to unsubstituted one except that with x = 0.02. It is noticed that the sample with x = 0.02 has the highest values of initial permeability, magnetization and Curie temperature, T_c. The homogeneity of the samples, the coercive field as well as T_c are found to decrease while the electrical resistivity increases with increasing Sm content.