GHz频率下软磁微导线巨磁阻抗效应研究

2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS) Pub Date : 2016-09-01 DOI:10.1109/METAMATERIALS.2016.7746423

A. Zhukov, M. Ipatov, V. Zhukova

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引用次数: 0

摘要

研究了各种富钴非晶微线的巨磁阻抗效应和磁性能。我们在GHz频率范围内测量了磁场对GMI比的依赖关系，并观察到即使在GHz频率下，所研究的细磁微线的GMI比也相当高。从磁滞回线和阻抗曲线上观察到磁各向异性的不同值。观察到的依赖性可以考虑金属核表层和内部不同的磁各向异性和集肤深度效应来解释。利用类核磁共振近似分析了高频GMI效应的特征。

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Studies of Giant magnetoimpedance effect in soft magnetic microwires at GHz frequencies

We studied Giant magnetoimpedance (GMI) effect and magnetic properties of various Co-rich amorphous microwires. We measured magnetic field dependences of the GMI ratio up to GHz frequency range and observed quite high GMI ratio in studied thin magnetic microwires even at GHz frequencies. We observed different values of the magnetic anisotropy field obtained from the hysteresis loops and the impedance curves. Observed dependences can be explained considering different magnetic anisotropy in the surface layers and in the inner part of metallic nucleus and skin depth effect. Features of high frequency GMI effect have been analyzed using FMR-like approximation.

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2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS)

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