Enhanced Structural And Electrical Properties Of Ca-Ba Rare Earth Substituted M-Type Hexaferrites

Effect of Indium-Manganese (In-Mn) substitution on the structural electrical and dielectric properties of Ca0.5-x Ba0.5InxMnyFe12-yO19 (x = 0.00-0.10; y = 0.00-1.00) hexaferrites prepared by sol-gel auto combustion method was reported. As-synthesized samples were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and electrical and dielectric properties (resistivity and conductivity). The X-ray diffraction analysis confirmed the formation of M-type hexaferrite structure. A slight enhancement was found in the in-plane lattice constant alpha, while the lattice constant c was suppressed with the increasing concentration of In and Mn. The results of SEM images show that the grain size decreases with increase of In-Mn substitution from 10 mu m to 1 mu m. The increased dielectric properties and fine particle sizes are useful for many applications, such as cores of inductors, transformers, isolators and magnetic memory devices.