BA-FERRITE FILMS PREPARED BY SOL-GEL DIP COATING

We investigated on the crystallographic, morphological and magnetic ch aracteristics of barium ferrite-SiO2/Si films prepared by sol-gel dip coating method. It is found that the sol obtained at 80 degrees C for 90 min. is the most suitable for coating. The particles formed in the films prepared by heat treatment at 800 degrees C for 3 hours exhibits needle-like particles placing parallel to substrate. The saturation m agnetization increases as thickness increases, and its maximum value i s 260 emu/cm(3). The direction of easy-magnetization in the films has tendency to vary from perpendicular to parallel to substrate as thickn ess increases.