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

doi:10.1088/1674-1056/aca148

中国物理B ›› 2023, Vol. 32 ›› Issue (8): 84202-084202.doi: 10.1088/1674-1056/aca148

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

Yun-Guo Ma(马云国)¹, Liang Qiao(乔亮)^1,†, Zu-Ying Zheng(郑祖应)¹, Hong-Bo Hao(郝宏波)², Hao Wang(王浩)¹, Zhe Sun(孙哲)¹, Cheng-Fa Tu(涂成发)¹, Tao Wang(王涛)¹, Zheng Yang(杨正)¹, and Fa-Shen Li(李发伸)¹

1. Institute of Applied Magnetism, Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou 730000, China;
2. State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization, Baotou 014000, China

收稿日期:2022-05-31 修回日期:2022-11-07 接受日期:2022-11-09 发布日期:2023-07-27
通讯作者: Liang Qiao E-mail:qiaoliang@lzu.edu.cn
基金资助:
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).

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

1. Institute of Applied Magnetism, Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou 730000, China;
2. State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization, Baotou 014000, China

Received:2022-05-31 Revised:2022-11-07 Accepted:2022-11-09 Published:2023-07-27
Contact: Liang Qiao E-mail:qiaoliang@lzu.edu.cn
Supported by:
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).

摘要/Abstract

摘要： 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.

关键词: reduction-diffusion method, microwave absorption, interface reflection model, effective absorption bandwidth

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.

Key words: reduction-diffusion method, microwave absorption, interface reflection model, effective absorption bandwidth

中图分类号: (Wave propagation, transmission and absorption)

42.25.Bs

42.81.Dp (Propagation, scattering, and losses; solitons) 71.20.Eh (Rare earth metals and alloys) 72.30.+q (High-frequency effects; plasma effects)

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[J]. 中国物理B, 2023, 32(8): 84202-084202.

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

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

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