Abstract
External bending stresses applied to Co-based Metglas ribbons are used to evidence, through their effects on magnetic properties at low field, different structural characteristics of the layers near the air side and the wheel-side surfaces of the ribbons. The samples are studied in the as-received condition and after suitable annealing treatments at various temperatures far from that of crystallization of the material. It is shown that differences between the surface layers are evident even if the annealing is performed at temperatures higher than the Curie temperature, i.e. in the paramagnetic state. The characteristics of the two surface layers depend strongly on the annealing temperature and are discussed.
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