Abstract
The giant magneto-impedance (GMI) effect is consid- ered for the case of high frequencies, when domain wall motion is strongly damped and magnetization proceeds mainly via the rotation of magnetic moments. The theoretical approach is based on the skin effect in a magnetic conductor with the rotational permeability tensor. In the case of a strong skin effect, the rotational mechanism of GM1 in a transverse magnetic structure is found to result in an impedance change of as much as 100% in magnetic fields of the order of the anisotropy field. The high-frequency response of impedance is generally larger than that associated with the magne- tization via the wall movement. The theoretical results agree satisfactorily with existing experimental data obtained for Co-rich amophous wires and films.
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