Asymmetric magnetoimpedance of a magnetically soft wire

Abstract

Frequency changes in the experimental dependences of the impedance on the strength of the magnetic-bias direct current flowing through a wire of magnetically soft amorphous alloy of composition Co₆₆Fe₄Nb_2.5Si_12.5B₁₅ with a low positive constant of saturation magnetostriction are due to the combined type of its magnetic anisotropy and indicate the presence of a multidomain structure with a helicoidal orientation of magnetization in the subsurface layer and also the effect of the motion of domain walls on the highfrequency impedance.