A model for asymmetric magnetoimpedance effect in multilayered bimagnetic films

被引：10
作者：
Buznikov, N. A. [1 ]
Antonov, A. S. [2 ]
机构：
[1] Sci & Res Inst Nat Gases & Gas Technol Gazprom VN, Leninsky Dist 142717, Moscow Region, Russia
[2] Russian Acad Sci, Inst Theoret & Appl Electrodynam, Moscow 125412, Russia
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2016年 / 420卷
关键词：
Ferromagnetic films; Magnetoimpedance; Magnetostatic coupling; Bias field; GIANT MAGNETO-IMPEDANCE; SANDWICHED FILMS; DOMAIN-STRUCTURE; AMORPHOUS WIRES; BIAS FIELD; ANISOTROPY; LAYERS; GMI;
D O I：
10.1016/j.jmmm.2016.06.088
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The magnetoimpedance in three-layered bimagnetic film structure is studied theoretically. The structure consists of the soft and hard magnetic films separated by highly conductive non-magnetic layer. A model to describe the magnetoimpedance effect in the film structure based on a simultaneous solution of linearized Maxwell equations and Landau-Lifshitz equation is proposed. It is shown that magnetostatic coupling between the magnetic layers results in the asymmetry in the field dependence of the film impedance. The magnetostatic coupling is described in terms of an effective bias field appearing in the soft magnetic layer. The calculated field and frequency dependences of the film impedance are shown to be in a qualitative agreement with previous results of experimental studies of the asymmetric magnetoimpedance in NiFe/Cu/Co film structures. The results obtained may be useful for development of weak magnetic-field sensors. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：51 / 55
页数：5
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