Electrical properties of Ni0.65Zn0.35CuxFe2−xO4 ferrites

A series of samples in the system Ni0.65Zn0.35CuxFe2−xO4 (x=0, 0.1, 0.2, 0.3, 0.4 and 0.5) were prepared by the usual ceramic technique. Seebeck coefficient, d.c. resistivity, activation energy, drift mobilityΜ and time constant measurements are presented for all samples. As expected, the activation energies were lower for samples of higher conductivity and mobility.