CHARACTERIZATION OF Fe₂O₃FILMS CONSISTING OF FINELY DIVIDED γ-Fe₂O₃PARTICLES Characterization of Fe₂O₃Film

Abstract Two kinds of films consisting of either γ-Fe2O3 or potassium doped γ-Fe203 particles were prepared by a spin-on process using a solution of iron(HI) nitrate dissolved in ethylene glycol on a glass plate. These particles were tightly linked with each other and two-dimensionally extended over the glass plate, so that the film thickness was almost the same as the mean size of the particle. The surface analyses of the films were performed by XPS and AES techniques, leading to conclusions that the carbon contamination is little and that the potassium is mainly located just below the surface of the films especially in the thick film. The addition of potassium did not affect the particle size but the effects were observed in the magnetic and gas adsorptive properties.