Influence of magnetic field on the tensoresistive effect in iron-based amorphous alloys

The effect of an applied magnetic field H on the tensoresistive effect in Fe-T-B (T = Fe, Cr, and Co) and Fe-B-Si amorphous metallic alloys has been studied. The applied magnetic field H is shown to substantially affect the coefficient of tensoresistance (CTR) π determined upon a longitudinal deformation of samples. The principal cause of such an effect is a change in Young’s modulus under the effect of a magnetic field, i.e., the ΔE effect. Based on the performed analysis, an equation for the determination of the ΔE effect from the measurement of the π(H) dependences is suggested. The results obtained indirectly confirm the assumption on the fact that the anomalous value of the coefficient of tensoresistance in amorphous alloys is due to a distortion of the spherical symmetry of the structure factor.