Abstract

The influence of small substitution of iron with rare-earth cations in nickel zinc ferrites has been investigated. Samples with overall composition Ni_0.50Zn_0.51Fe_1.96R_0.04O_4+δ (R = Pr, Nd, Eu, Ho, Tm, Lu) were prepared by a wet chemical route. The substitution of iron by rare-earth cations results in the formation of various rare-earth iron oxides in the bulk ferrite during sintering. Differences in the electrical and magnetic properties of the doped samples are interpreted on the basis of phase composition and microstructure.