ABSTRACT
The interest to the GMI effect is related with the high sensitivity of the impedance to an applied magnetic field. Earlier, it has been demonstrated [1, 2] that the application of tensile or torsion stresses results in significant changes in the GMI effect. The discovery of the torsion impedance effects [3, 4] showing high sensitivity of the impedance to the applied torsion stress attracted researchers’ attention to the investigation of the helical magnetic structure in amorphous wires [5-8]. Particularly, interest to the study of the surface helical structure is determined by the fact that the glass coating sheath introduces additional stress in the surface area of the wire due to the difference between the thermal expansion coefficients of the glass coating and the metallic nucleus.
