EFFECT OF STRESS ANNEALING ON THE MAGNETOSTRICTION CONSTANT AND INDUCED MAGNETIC-ANISOTROPY IN [CO1-XNIX]75SI15B10 METALLIC GLASSES

Amorphous ribbons of composition [Co1-xNix]75Si15B10 (0 < x < 0.30) were annealed by means of electrical current while applying a tensile stress. After thermal treatments, the magnetostriction constant and induced magnetic anisotropy were determined at room temperature. The strength of the induced anisotropy and the magnetostriction constant depends on the annealing temperature, the thermal history of the sample and the composition in two of these samples by conventional annealing under stress. Previous discussions on the kinetics of field- and stress-induced magnetic anisotropy are extended. The influence of stress annealing on the temperature dependence of the magnetostriction of the samples, in order to analyse λs(T) in terms of one-ion and two-ions spin correlation functions, has been also investigated. © 1990.