High-entropy bulk metallic glasses as promising magnetic refrigerants
High-entropy bulk metallic glasses as promising magnetic refrigerants
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高熵块状金属玻璃作为有前景的磁性制冷剂
DOI：
10.1063/1.4908286
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发表时间：
2015-02-21
影响因子：
3.2
通讯作者：
Li, Run-Wei
中科院分区：
文献类型：
--
作者：
Huo, Juntao;Huo, Lishan;Li, Run-Wei
本文成功制备了具有良好磁热性能的Ho 20 Er 20 Co20 Al 20 RE 20（RE = Gd，Dy，Tm）高熵大块金属玻璃（HE-BMG）。HE-BMG表现出二级磁相变。磁熵变峰值（Delta S-M（pk））和制冷剂容量峰值（RC）在5 T时分别达到15.0 J kg（-1）K-1和627 J kg（-1），大于大多数稀土基BMG。玻璃的异质性也有助于大的Δ S-M（pk）和RC。此外，通过合金化不同的稀土元素，磁有序温度，Δ S-M（pk）和RC可以广泛地调节。这些结果表明，HE-BMG是一种很有前途的低温磁制冷剂。(C)2015 AIP Publishing LLC.
In this paper, the Ho20Er20Co20Al20RE20 (RE = Gd, Dy, and Tm) high-entropy bulk metallic glasses (HE-BMGs) with good magnetocaloric properties are fabricated successfully. The HE-BMGs exhibit a second-order magnetic phase transition. The peak of magnetic entropy change (Delta S-M (pk)) and refrigerant capacity (RC) reaches 15.0 J kg(-1) K-1 and 627 J kg(-1) at 5 T, respectively, which is larger than most rare earth based BMGs. The heterogeneous nature of glasses also contributes to the large Delta S-M (pk) and RC. In addition, the magnetic ordering temperature, Delta S-M (pk) and RC can be widely tuned by alloying different rare earth elements. These results suggest that the HE-BMGs are promising magnetic refrigerant at low temperatures. (C) 2015 AIP Publishing LLC.