Microwave absorption and bandwidth study of Y_(2)Co_(17)rare earth soft magnetic alloy with easy-plane anisotropy  

作　　者：马云国 乔亮 郑祖应 郝宏波 王浩 孙哲 涂成发 王涛 杨正 李发伸 Yun-Guo Ma;Liang Qiao;Zu-Ying Zheng;Hong-Bo Hao;Hao Wang;Zhe Sun;Cheng-Fa Tu;Tao Wang;Zheng Yang;Fa-Shen Li(Institute of Applied Magnetism,Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education,Lanzhou University,Lanzhou 730000,China;State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization,Baotou 014000,China)

机构地区：[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

出　　处：《Chinese Physics B》2023年第8期310-318,共9页中国物理B（英文版）

基　　金：Project supported by the National Key R&D Program of China(Grant No.2021YFB3501302);the National Natural Science Foundation of China(Grant No.51731001);supported by the State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization’s key of research and development projects。

摘　　要：The easy-plane anisotropy of the Y_(2)Co_(17)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,Y_(2)Co_(17)alloy was prepared by a reduction-diffusion method,and its micropowder was prepared as polyurethane(PU)based composite absorbing materials(Y_(2)Co_(17)/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 d B.When the volume fraction was25%,the effective absorption bandwidth could cover the X-band at a thickness of 1.5 mm,and the Ku-band at a thickness of1.08 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 

分 类 号：O469[理学—凝聚态物理]