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Magnetic properties and magnetocaloric effect in RE55Co30Al10Si5 (RE = Er and Tm) amorphous ribbons |
| 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 The magnetic and magnetocaloric effects (MCE) of the amorphous $RE_{55}$Co$_{30}$Al$_{10}$Si$_{5}$ ($RE={\rm Er}$ and Tm) ribbons were systematically investigated in this paper. Compounds with $R ={\rm Er}$ and Tm undergo a second-order magnetic phase transition from ferromagnetic (FM) to paramagnetic (PM) around Curie temperature $T_{\rm C} \sim 9.3$ K and 3 K, respectively. For Er$_{55}$Co$_{30}$Al$_{10}$Si$_{5}$ compound, an obvious magnetic hysteresis and thermal hysteresis were observed at low field below 6 K, possibly due to spin-glass behavior. Under the field change of 0 T-5 T, the maximum values of magnetic entropy change ($-\Delta S_{\rm M}^{\rm max}$) reach as high as 15.6 J/kg$\cdot$K and 15.7 J/kg$\cdot$K for Er$_{55}$Co$_{30}$Al$_{10}$Si$_{5}$ and Tm$_{55}$Co$_{30}$Al$_{10}$Si$_{5}$ compounds, corresponding refrigerant capacity (RC) values are estimated as 303 J/kg and 189 J/kg, respectively. The large MCE makes amorphous $RE_{55}$Co$_{30}$Al$_{10}$Si$_{5 }$ ($RE={\rm Er}$ and Tm) alloys become very attractive magnetic refrigeration materials in the low-temperature region.
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Received: 26 May 2022
Revised: 06 July 2022
Accepted manuscript online: 05 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 Natural Science Foundation for Distinguished Young Scholars (Grant No. 51925605), and the Scientific Instrument Developing Project of the Chinese Academy of Sciences (Grant No. YJKYYQ20200042). |
Corresponding Authors:
Zhaojun Mo, Baogen Shen
E-mail: mozhaojun@gia.cas.cn;shenbg@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 effect in RE55Co30Al10Si5 (RE = Er and Tm) amorphous ribbons 2022 Chin. Phys. B 31 117503
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