Magnetic structure and magnetoimpedance effect in stress-annealed cobalt-based amorphous ribbons with different values of induced magnetic anisotropy

The magnetoimpedance effect, induced magnetic anisotropy, and domain struct ure are investigated in the amorphous Fe3Co67Cr3Si15B12 ribbons with a near ly zero magnetostriction, in which a transverse magnetic anisotropy was ind uced by stress annealing using different regimes. The dependence of the rel ative change in the magnetoimpedance DeltaZ/Z on the frequency f is measure d in a frequency range f = 0.1-2 MHz at current amplitudes of 3.0, 3.5, and 4 mA. Distinctions in the magnetoimpedance behavior were observed for the samples with the same constants of the transverse magnetic anisotropy induc ed at temperatures 250 and 350 degreesC, e.g., in the hysteresis behavior o f DeltaZ/Z in a magnetic field in ribbons subjected to certain regimes of t hermomechanical treatment. The correlation between the magnetoimpedance, in duced magnetic anisotropy parameters, and magnetic domain structure is anal yzed.