Giant magneto-impedance effect in stress-annealed amorphous ribbons

Abstract

The field dependence of giant magneto-impedance ratio in Fe 3 Co 67 Cr 3 Si 15 B 12 amorphous ribbons with near zero magnetostriction is shown after different stress annealings at temperatures 250 and 350°C. This phenomenon is studied as a function of the amplitude and frequency of the current along the sample It is concluded that although the strength of the induced anisotropy is quite importante, the fine structure of zig-zag domain walls plays an important role to determine maximum magneto-impedance value.