Effect of Ni substitution on magnetic properties and microwave absorption of the Y2Co17 compounds and composites

• Published in: Journal of applied physics 2023-11, Vol.134 (17)
• Main Authors: Sheng, Yan-Fei, Tu, Cheng-Fa, Wu, Peng, Yang, Sheng-Yu, Ma, Yun-Guo, Wang, Hao, Wang, Ke, Li, Fa-Shen, Wang, Tao, Qiao, Liang, Yang, Jin-Bo, Wang, Chang-Sheng
• Format: Article
• Language: English
• Subjects: Applied physics; Bandwidths; Crystal structure; Doping; Frequency ranges; Magnetic properties; Mathematical analysis; Microwave absorption; Physical factors; Polyurethane resins; Rare earth alloys; Reflection
• ISSN: 0021-8979; 1089-7550
• DOI: 10.1063/5.0172190

The rare earth alloy Y 2Co 17 − xNi x was prepared by a low-cost co-precipitation reduction-diffusion process, and its crystal structure, static magnetic properties, and microscopic morphology were systematically characterized. The effects of Ni doping with different contents on the electromagnetic parameters and wave absorption properties of Y 2Co 17 − xNi x/polyurethane(PU) compounds were researched in the frequency range of 0.1–18 GHz. The results show that the static magnetic properties and wave absorption properties change significantly with Ni doping, and the maximum reflection loss of Y 2Co 14Ni 3/PU reaches − 89.7 dB at 2.9 mm thickness, and the maximum reflection loss peaks of Y 2Co 17/PU and Y 2Co 16Ni 1/PU are at 1.316 and 1.515 GHz, which is at the center frequency of the L-band. With Ni doping, the effective absorption bandwidth of the compounds at a frequency above 3 GHz is greatly increased. The physical factor in the bandwidth calculation was modified, and the effective absorption bandwidth of the material was calculated theoretically, and the error was less than 5 % compared with the experimental value.