中国物理B ›› 2022, Vol. 31 ›› Issue (12): 127501-127501.doi: 10.1088/1674-1056/ac89d8

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Magnetic properties and magnetocaloric effects of Tm1-xErxCuAl (x = 0.25, 0.5, and 0.75) compounds

Hao Sun(孙浩)1,2, Junfeng Wang(王俊峰)2, Lu Tian(田路)2, Jianjian Gong(巩建建)1,2, Zhaojun Mo(莫兆军)2,†, Jun Shen(沈俊)3, and Baogen Shen(沈保根)1,‡   

  1. 1 School of Rare Earths, University of Science and Technology of China, Hefei 230026, China;
    2 Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, China;
    3 Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2022-06-14 修回日期:2022-08-09 接受日期:2022-08-16 出版日期:2022-11-11 发布日期:2022-11-11
  • 通讯作者: Zhaojun Mo, Baogen Shen E-mail:mozhaojun@gia.cas.cn;shenbg@aphy.iphy.ac.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 52171195, and 52171054), the National Science Foundation for Distinguished Young Scholars (Grant No. 51925605), and the Scientific Instrument Developing Project of Chinese Academy of Sciences (Grant No. YJKYYQ20200042).

Magnetic properties and magnetocaloric effects of Tm1-xErxCuAl (x = 0.25, 0.5, and 0.75) compounds

Hao Sun(孙浩)1,2, Junfeng Wang(王俊峰)2, Lu Tian(田路)2, Jianjian Gong(巩建建)1,2, Zhaojun Mo(莫兆军)2,†, Jun Shen(沈俊)3, and Baogen Shen(沈保根)1,‡   

  1. 1 School of Rare Earths, University of Science and Technology of China, Hefei 230026, China;
    2 Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, China;
    3 Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2022-06-14 Revised:2022-08-09 Accepted:2022-08-16 Online:2022-11-11 Published:2022-11-11
  • Contact: Zhaojun Mo, Baogen Shen E-mail:mozhaojun@gia.cas.cn;shenbg@aphy.iphy.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 52171195, and 52171054), the National Science Foundation for Distinguished Young Scholars (Grant No. 51925605), and the Scientific Instrument Developing Project of Chinese Academy of Sciences (Grant No. YJKYYQ20200042).

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摘要： We investigate the structural, magnetic, and magnetocaloric effects (MCE) of Tm$_{1-x}$Er$_{x}$CuAl ($x = 0.25$, 0.5, and 0.75) compounds. The compounds undergo a second-order phase transition originating from the ferromagnetic to paramagnetic transition around 3.2 K, 5 K, and 6 K, respectively. The maximum magnetic entropy changes (${-\Delta S}_{\scriptscriptstyle{\rm M}}^{\rm max}$) of Tm$_{1-x}$Er$_{x}$CuAl ($x = 0.25$, 0.5, and 0.75) are 17.1 J$\cdot$kg$^{-1}\cdot$K$^{-1}$, 18.1 J$\cdot$kg$^{-1}\cdot$K$^{-1}$, and 17.5 J$\cdot$kg$^{-1}\cdot$K$^{-1}$ under the magnetic field in the range of 0-2 T, with the corresponding refrigerant capacity (RC) values of 131 J$\cdot$kg$^{-1}$, 136 J$\cdot$kg$^{-1}$, and 126 J$\cdot$kg$^{-1}$, respectively. The increase of ${-\Delta S}_{\scriptscriptstyle{\rm M}}^{\rm max}$ for Tm$_{0.5}$Er$_{0.5}$CuAl may be relevant to the change of magnetic moment distribution of Er and stress coming from element substitution. This work provides several compounds that can enrich the family of giant MCE materials in the cryogenic region.

关键词: TmCuAl-based alloy, magnetic property, magnetocaloric effect, magnetic refrigeration

Abstract: We investigate the structural, magnetic, and magnetocaloric effects (MCE) of Tm$_{1-x}$Er$_{x}$CuAl ($x = 0.25$, 0.5, and 0.75) compounds. The compounds undergo a second-order phase transition originating from the ferromagnetic to paramagnetic transition around 3.2 K, 5 K, and 6 K, respectively. The maximum magnetic entropy changes (${-\Delta S}_{\scriptscriptstyle{\rm M}}^{\rm max}$) of Tm$_{1-x}$Er$_{x}$CuAl ($x = 0.25$, 0.5, and 0.75) are 17.1 J$\cdot$kg$^{-1}\cdot$K$^{-1}$, 18.1 J$\cdot$kg$^{-1}\cdot$K$^{-1}$, and 17.5 J$\cdot$kg$^{-1}\cdot$K$^{-1}$ under the magnetic field in the range of 0-2 T, with the corresponding refrigerant capacity (RC) values of 131 J$\cdot$kg$^{-1}$, 136 J$\cdot$kg$^{-1}$, and 126 J$\cdot$kg$^{-1}$, respectively. The increase of ${-\Delta S}_{\scriptscriptstyle{\rm M}}^{\rm max}$ for Tm$_{0.5}$Er$_{0.5}$CuAl may be relevant to the change of magnetic moment distribution of Er and stress coming from element substitution. This work provides several compounds that can enrich the family of giant MCE materials in the cryogenic region.

Key words: TmCuAl-based alloy, magnetic property, magnetocaloric effect, magnetic refrigeration

中图分类号:  (Magnetocaloric effect, magnetic cooling)

  • 75.30.Sg
75.47.Np (Metals and alloys)