Study on Physical Process of Surface Oxidation of Rare Earth-Transition Metal Amorphous Magneto-Optical Thin Films

摘要

By using surface effects（Auger electron spectroscopy,X-ray photoelectron spectroscopy,polar Kerreffect）and volume effects（magnetization,torque curve）the physical process of surface oxidation of rareearth-transition metal amorphous magneto-optical thin films was studied in this paper.The rare earth elementsoxidize preferentially and rich at the film surface,and the transition metals deplete in oxidation layer.Fe₂O₃ inthe surface oxidation layer contributes to the planar magnetization,and thereby the anomalous peak appearsnear 180° on the torque curves and the amplitude of the peaks is related to the depth of surface oxidationlayers.The iron bonds to oxygen easier than the cobolt.RE-Co magneto-optieal thin films have good propertiesof resistance to oxidation and humidity.