| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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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 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 |
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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.
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Received: 14 June 2022
Revised: 09 August 2022
Accepted manuscript online: 16 August 2022
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PACS:
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75.30.Sg
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(Magnetocaloric effect, magnetic cooling)
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75.47.Np
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(Metals and alloys)
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| Fund: 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). |
Corresponding Authors:
Zhaojun Mo, Baogen Shen
E-mail: mozhaojun@gia.cas.cn;shenbg@aphy.iphy.ac.cn
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Cite this article:
Hao Sun(孙浩), Junfeng Wang(王俊峰), Lu Tian(田路), Jianjian Gong(巩建建), Zhaojun Mo(莫兆军), Jun Shen(沈俊), and Baogen Shen(沈保根) Magnetic properties and magnetocaloric effects of Tm1-xErxCuAl (x = 0.25, 0.5, and 0.75) compounds 2022 Chin. Phys. B 31 127501
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