Temperature dependence of resistivity, dielectric constant and dielectric loss have been
investigated for four different compositions of nickel–zinc ferrites, Ni1− xZnxFe2O4 (x= 0.2,
0.35, 0.5 and 0.6), prepared by the citrate precursor technique. Activation energies
calculated from the resistivity versus temperature curves for the compositions sintered at
1200° C and 1300° C range from 0.55 eV to 0.73 eV. Samples sintered at 1200° C exhibit
higher activation energies and low dielectric losses compared to those sintered at 1300° C …