Effect of spin-reorientation transition of cell boundary phases on the temperature dependence of magnetization and coercivity in Sm_(2)Co_(17) magnets

作     者：涂思思 刘雷 周波 董创辉 叶力铭 孙颖莉 丁勇 闫阿儒 毛信表 Si-Si Tu;Lei Liu;Bo Zhou;Chuang-Hui Dong;Li-Ming Ye;Ying-Li Sun;Yong Ding;A-Ru Yan;Xin-Biao Mao

作者机构：College of Chemical EngineeringZhejiang University of TechnologyHangzhou 310014China CISRI and NIMTE Joint Innovation Center for Rare Earth Permanent MagnetsCAS Key Laboratory of Magnetic Materials and DevicesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2023年第32卷第12期

页      面：541-546页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学] 

基　　金：Project supported by the National Key R&D Program of China (Grant Nos.2021YFB3803003 and 2021YFB3503101) Youth Innovation Promotion Association of CAS (Grant No.2023311) Major Project of‘Science and Technology Innovation 2025’in Ningbo (Grant No.2020Z044) Zhejiang Provincial Key Research and Development Program (Grant No.2021C01172) 

主　　题：spin-reorientation transformation low-temperature coefficient Sm_(2)Co_(17)magnets 

摘      要：Four Sm_(2)Co_(17)magnets with spin-reorientation transition(SRT)of cell boundary phases(CBPs)are prepared by liquid-phase *** temperature of the SRT of CBPs(T_(SR)^(1:5))is regulated from 125 K to 195 K by adding 0 wt.%,3 wt.%,6 wt.%and 9 wt.%Dy_(88)Cu_(12)alloy *** effect of SRT of Sm_(2)Co_(17)magnet CBPs on the temperature dependence of the magnetization(M-T)and coercivity(H-T)is systematically *** temperature dependence of the magnetization is influenced by the SRT of *** M-T curves measured during the heating process are larger than those measured during the cooling process when TT_(SR)^(1:5)the M-T curves overlap and the M-T derivation curve shows that the magnetization of the magnet has low temperature dependence of magnetization above T_(SR)^(1:5).With increasing T_(SR)^(1:5),the initial temperature of the low temperature dependence of magnetization shifts towards a higher *** coercivity temperature coefficient becomes positive as the SRT effect increases,and the temperature range of the positive coercivity temperature coefficient moves towards higher temperatures as T_(SR)^(1:5)*** reveals that SRT of CBPs has little effect on the temperature dependence of magnetization above T_(SR)^(1:5),while the temperature dependence of coercivity is *** temperature range of magnetization and coercivity with low temperature dependence tends towards higher temperatures,which is conducive to the preparation of magnets with a low temperature coefficient at higher temperatures.