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The oxidation kinetics of unovercoated TbFeCo alloys at 70°C is studied utilizing Kerr, VSM and ESCA measurements. In this manner the effect of oxidation-induced compositional modification on magneto-optical properties of the alloy are investigated. It is determined that oxygen diffusion leads to the formation of a structure consisting of a matrix of an oxide of Tb within which metallic Fe and Co are encountered. The presence of this complex matrix severely modifies the overall properties of the alloy.
Date of Publication: Sep 1987