CORRELATION BETWEEN DOMAIN-STRUCTURE AND PERMEABILITY UNDER STRESS IN METALLIC GLASSES WITH INDUCED ANISOTROPY

Experiments were performed on Co67Fe4Cr7Si8B14 metallic glass in which the transverse magnetic anisotropy was induced by a proper annealing process. Measurements of the magnetic permeability mu at high frequency of 20 and 200 kHz were performed versus tensile stress applied to the sample. It was found that for the low-stress region the value of the initial permeability increases with the stress but at higher stress, depending on the induced anisotropy, the behavior of mu can be significantly modified. The results obtained are interpreted as an influence of the stress-dependent modification of the domain pattern, as shown by the observation of the Kerr effect domain structure.