Microstructure And Electromagnetic Properties Of Li-Cd Ferrites

Abstract

A series of Li0.5−x/2CdxBi0.02Fe2.48−x/2O4 ferrites for x = 0.0 to 0.7, were prepared by conventional double sintering ceramic technique. The lattice parameter is found to increase linearly with Cd content. SEM micrographs reveal that an increase of grain size is observed up to x = 0.4 with increasing Cd content and then the grain size decreases slowly with further increase of Cd content. Similar trend is observed in the variation of saturation magnetization Ms with Cd content. This is explained on the basis of Neel’s and Yafet‐Kittle (Y‐K) model. The Curie temperature also decreases linearly with Cd content and is due to the decrease in the strength of the A‐B exchange interaction. DC resistivity and AC resistivity is found to decrease with increasing Cd content and frequency respectively.