Structural Modification in Amorphous Magnetic Alloys Under Thermotreatment

Abstract

The experimental results of research of structural modifications in amorphous magnetic alloys (AMAs) under thermotreatment obtained by angular and spectroellipsometric methods are presented and discussed. The ductile-brittle transition was observed for the ribbons of some 3d-metal-based amorphous alloys. The relationship between the principal angle of incidence (po and annealing temperature Ta of alloys was obtained for the ribbons of AMAs. The observed behaviour of 0po is connected with appearance of the novel amorphous phase's clusters inside the surface's layers of alloys.The influence of melt's overheating on the atomic and electronic structure of AMAs was studied. It was found that the increase of melt's overheating temperature leads to the decrease of absorption index within the whole spectral range (1i•o=0.5-4.38 eV). The structural anisotropy of AMAs and its changes after annealings were determined by reflectometric and ellipsometric measurements.