Microwave reflection properties of planar anisotropy Fe50Ni50 powder/paraffin composites

doi:10.1088/1674-1056/21/3/037601

中国物理B ›› 2012, Vol. 21 ›› Issue (3): 37601-037601.doi: 10.1088/1674-1056/21/3/037601

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

位建强,张钊琦,韩瑞,王涛,李发伸

收稿日期:2011-07-14 修回日期:2011-10-30 出版日期:2012-02-15 发布日期:2012-02-15
通讯作者: 李发伸,lifs@lzu.edu.cn E-mail:lifs@lzu.edu.cn

Microwave reflection properties of planar anisotropy Fe₅₀Ni₅₀ powder/paraffin composites

Wei Jian-Qiang(位建强), Zhang Zhao-Qi(张钊琦), Han Rui(韩瑞), Wang Tao(王涛), and Li Fa-Shen(李发伸)^†

Institute of Applied Magnetics, Key Laboratory of Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou 730000, China

Received:2011-07-14 Revised:2011-10-30 Online:2012-02-15 Published:2012-02-15
Contact: Li Fa-Shen,lifs@lzu.edu.cn E-mail:lifs@lzu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 10774061), the Defense Industrial Technology Development Program, China (Grant No. A1420080174), and the Fundamental Research Funds for the Central Universities.

摘要/Abstract

Abstract: The reflection properties of planar anisotropy Fe₅₀Ni₅₀ powder/paraffin composites have been studied in the microwave frequency range. The permeability of Fe₅₀Ni₅₀ powder/paraffin composites is greatly enhanced by introducing the planar anisotropy, and can be further enhanced by using a rotational orientation method. The complex permeability can be considered as the superposition of two types of magnetic resonance. The resonance peak at high frequency is attributed to the natural resonance, while the peak at low frequency is attributed to the domain-wall resonance. The simulated results of the microwave reflectivity show that the matching thickness, peak frequency, permeability, and permittivity are closely related to the quarter wavelength matching condition. The Fe₅₀Ni₅₀ powder/paraffin composites can be attractive candidates for thinner microwave absorbers in the L-band (1-2 GHz).

Key words: reflection property, complex permeability, microwave absorption

中图分类号: (Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance)

76.50.+g

75.30.Gw (Magnetic anisotropy)

位建强,张钊琦,韩瑞,王涛,李发伸. [J]. 中国物理B, 2012, 21(3): 37601-037601.

Wei Jian-Qiang(位建强), Zhang Zhao-Qi(张钊琦), Han Rui(韩瑞), Wang Tao(王涛), and Li Fa-Shen(李发伸) . Microwave reflection properties of planar anisotropy Fe₅₀Ni₅₀ powder/paraffin composites[J]. Chin. Phys. B, 2012, 21(3): 37601-037601.

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Microwave reflection properties of planar anisotropy Fe₅₀Ni₅₀ powder/paraffin composites

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