Structural properties of Cd-Co ferrites

摘要

Ferrite samples with composition, Cd_xCo_(1-x)Fe_2O_4 (x - 0-80, 0-85, 0-90, 0-95 and 10), were prepared by standard ceramic method and characterized by XRD, IR and SEM techniques. X-ray analysis confirms the formation of single phase cubic spinel structure. Lattice constant and grain size of the samples increase with increase in cadmium content. Bond length (A-O) and ionic radii (r_A) on A-sites increase, whereas bond length (B-O) and ionic radii (r_B) on B-site decrease. The crystallite sites of the samples lie in the range of 29-1-42-8 nm. IR study shows two absorption bands around 400 cm~(-1) and 600 cm~(-1) corresponding to tetrahedral and octahedral sites, respectively.