Cadmium substituted high permeability lithium ferrite

Abstract

Polycrystalline Li_0.5-x/2Cd_xFe_2.5-x/22O₄ ferrites wherex = 0, 0.1, 0.2, 0.3, 0.4, 0.5 and 0.6 were prepared by a double sintering ceramic technique and characterized by X-ray diffraction and scanning electron microscopy (SEM). The lattice parameter is found to increase monotonically with the cadmium content. It is explained in terms of the sizes of component ions. The grain size of the samples increases up tox = 0.3 and then it decreases for higher values ofx. A similar trend is observed in the variation of Ms with Cd²⁺ content. The initial permeability (μ_i) is however found to increase continuously withx. The increase in μ_i is attributed to decrease of anisotropy constant K₁ and higher grain size of the samples.