Abstract
In this work a study of the variation of the surface magnetic properties with oxidation in the Finemet amorphous alloy in the as-quenched state and after relaxation at 400°C for 30min is presented. The surface magnetization was obtained by the transverse magneto-optic Kerr effect. The results show that the Kerr intensity is higher in the relaxed samples than in the as-quenched ones with the same cycles of oxidation. In addition the surface saturation magnetization in the relaxed samples is reached at low applied that in the as-quenched ones. These facts indicate that structural relaxation of amorphous ribbon favors improvement of the oxidation resistance.
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