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Erschienen in:
01.08.2021 | ELECTRICAL AND MAGNETIC PROPERTIES
Magnetoimpedance of Periodic Partly Profiled Multilayer Film Structures
Erschienen in: Physics of Metals and Metallography | Ausgabe 8/2021
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Abstract
A new type of multilayer film structures with a giant magnetic impedance (GMI) is proposed and theoretically studied. The multilayer structure consists of a highly conductive central layer and two outer ferromagnetic layers located under and on the conductive layer. The upper layer is a periodic structure consisting of N multilayer elements and N + 1 regions without multilayer elements (the upper layer is profiled). An electrodynamic model has been developed that allows one to find the transverse permeabilities μ1 and μ2 for the upper and lower layers of the GMI structure using the standard procedure for solving the linearized Landau–Lifshitz equation and the equation for equilibrium magnetization angles. It is shown that, for a profiled structure, with a decrease in the angle of deviation of the effective magnetic anisotropy axis from the transverse direction, the permeability of the upper layer increases, which leads to the enhancement of the skin and GMI effects.