Cadmium substituted high permeability lithium ferrite

Polycrystalline Li0.5-x/2CdxFe2.5-x/2O3 ferrites where x = 0, 0.1, 0.2, 0.3 , 0.4, 0.5 and 0.6 were prepared by a double sintering ceramic technique an d 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 grai n size of the samples increases up to x = 0.3 and then it decreases for hig her values of x, A similar trend is observed in the variation of Ms with Cd 2+ content. The initial permeability (mu(i)) is however found to increase c ontinuously with x, The increase in mu(i) is attributed to decrease of anis otropy constant K-1 and higher grain size of the samples.