Effect of Cd2+ Substitution on the Magnetic Properties of NiCuZn Ferrites for Low Temperature Firing

Abstract

Cd2+-substituted NiCuZn ferrites with compositions of Ni0.24-yCdyCu0.21Zn0.55Fe1.92O3.88(y = 0.00, 0.002, 0.005, 0.007, 0.01) were prepared by a solid state reaction method. The effects of Cd2+substitution on phase, microstructure feature and magnetic properties of samples were discussed. The results showed that NiCuZn ferrites with Cd2+substitution were single spinel phases. The lattice parameter decreased first and subsequently increased due to the difference of ions radius and incomplete substitution. The density of sintered samples had similar trend as well. The saturation magnetizationMSdecreased with the increase of Cd2+ions. The highest initial permeabilityμiand lowest relative loss factortanδ/μiwere found in the composition with Cd contenty=0.007 attributed to the decrease of crystal magnetic anisotropy constantK1of the ferrites.