Magnetocaloric effect of high-entropy rare-earth alloy GdTbHoErY
| Autor: | Jiangting Wang, Lin Li, Zhitian Liu, L. Ma, X. C. Zhong, Guang Hui Rao, Lu Shifan, Y. S. Du, Jing-Tai Zhao |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Range (particle radiation) Materials science Condensed matter physics Magnetic structure Alloy engineering.material Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Isothermal process Electronic Optical and Magnetic Materials Magnetic field Condensed Matter::Materials Science Lattice (order) 0103 physical sciences engineering Magnetic refrigeration Coupling (piping) Electrical and Electronic Engineering |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 32:10919-10926 |
| ISSN: | 1573-482X 0957-4522 |
| Popis: | Magnetocaloric effect of a single-phase high-entropy rare-earth alloy GdTbHoErY with the hexagonal close-packed (HCP) structure was studied. As the external field increases, the peak isothermal magnetic entropy change (ΔSM) of the alloy is accompanied by a hump, which widens the ΔSM peak and thus increases the refrigerant capacity (RC) value. Under a magnetic field of 5 T, the RC and the ΔSM reach 453 J kg−1 and 5.4 J kg−1 K−1, respectively. The high RC for the high-entropy alloy is mainly attributed to the wider working temperature range. Moreover, the random distribution of atoms in the lattice leads to a complex magnetic structure and exchange coupling in this alloy. This feature of high-entropy alloy GdTbHoErY makes a gradual change in the magnetic sequence, which leads to an enhanced magnetocaloric effect. |
| Databáze: | OpenAIRE |
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