Magneto-Impedance Tomography of Elastically Deformed Amorphous Co-Based Ribbons

Abstract— The distribution of the magnetic permeability over the cross section of rapidly quenched amorphous Co_68.6Fe_3.9Mo_3.0Si_12.0B_12.5 ribbons was studied in the range of elastic tensile stresses from 0 to 480 MPa. This distribution was restored using magnetic impedance tomography, which is a method based on the analysis of the frequency dependences of the impedance, when external magnetic fields of varying amplitude or tensile mechanical stresses are applied to ribbons. In this case, the alternating-current frequency varied in the range from 0.01 to 80 MHz.