Samples with the chemical formula Cu1−xZnxFe2O4 (x = 0.2, 0.4, 0.6, 0.8 or 1) were

prepared by the standard ceramic method. The dielectric constant and dielectric

loss tangent were studied as a function of vacancy jump rate. The results showed

that the dielectric constant and dielectric loss tangent decreased with increasing

vacancy jump rate. In addition, the electron jump length in the octahedral sites was studied as a function of zinc concentration. The increase in jump length with Zn

concentration was attributed to the substitution of Fe+3 for Zn2+ at the A-sites,

which increased the B–B interaction. The increase of diffusion coefficient with

increasing Zn concentration was reinforced by the increase in jump rate.

The Effect of Zinc Concentration on Vacancies Jump Rate, Diffusion Coefficient

and Jump Length in Cu–Zn Ferrite. H.M.Zaki: Journal of Physics and Chemistry

of Solids, 2009, 70[5], 889-92