Microwave absorption and bandwidth study of Y2Co17 rare earth soft magnetic alloy with easy-plane anisotropy

doi:10.1088/1674-1056/aca148

Abstract The easy-plane anisotropy of the Y₂Co₁₇ rare earth soft magnetic alloy has high saturation magnetization and operating frequency, and good impedance matching. Therefore, it is expected to become a kind of high-performance microwave absorbing material. In this paper, Y₂Co₁₇ alloy was prepared by a reduction-diffusion method, and its micropowder was prepared as polyurethane (PU) based composite absorbing materials (Y₂Co₁₇/PU composites). The microwave properties of composites with different volume fractions were calculated. The composites showed outstanding absorption characteristics in the range of 20-30 vol%, and the minimum reflection loss (RL) was less than -50 dB. When the volume fraction was 25%, the effective absorption bandwidth could cover the X-band at a thickness of 1.5 mm, and the Ku-band at a thickness of 1.08 mm. The absorption mechanism was analyzed by the interface reflection model. The RL absorption peak bandwidth mechanism was discussed by using the amplitude relation and calculating the effective absorption bandwidth at different thicknesses. The effective absorption bandwidth values were in good agreement with the theoretical expectation.

Keywords: reduction-diffusion method microwave absorption interface reflection model effective absorption bandwidth

Received: 31 May 2022
Revised: 07 November 2022
Accepted manuscript online: 09 November 2022

PACS:	42.25.Bs	(Wave propagation, transmission and absorption)
	42.81.Dp	(Propagation, scattering, and losses; solitons)
	71.20.Eh	(Rare earth metals and alloys)
	72.30.+q	(High-frequency effects; plasma effects)

Fund: Project supported by the National Key R&D Program of China (Grant No.2021YFB3501302) and the National Natural Science Foundation of China(Grant No.51731001).

Corresponding Authors: Liang Qiao
E-mail: qiaoliang@lzu.edu.cn

Cite this article:

Yun-Guo Ma(马云国), Liang Qiao(乔亮), Zu-Ying Zheng(郑祖应), Hong-Bo Hao(郝宏波), Hao Wang(王浩), Zhe Sun(孙哲), Cheng-Fa Tu(涂成发), Tao Wang(王涛), Zheng Yang(杨正), and Fa-Shen Li(李发伸) Microwave absorption and bandwidth study of Y₂Co₁₇ rare earth soft magnetic alloy with easy-plane anisotropy 2023 Chin. Phys. B 32 084202

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Microwave absorption and bandwidth study of Y2Co17 rare earth soft magnetic alloy with easy-plane anisotropy

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Microwave absorption and bandwidth study of Y₂Co₁₇ rare earth soft magnetic alloy with easy-plane anisotropy