Superconductivity in hexagonal Nb-Mo-Ru-Rh-Pd high-entropy alloys

被引：44
|
作者：
Liu, Bin [1 ,2 ,3 ]
Wu, Jifeng [1 ,2 ,3 ]
Cui, Yanwei [2 ,3 ,4 ]
Zhu, Qinqing [1 ,2 ,3 ]
Xiao, Guorui [2 ,3 ,4 ]
Wu, Siqi [4 ]
Cao, Guanghan [4 ]
Ren, Zhi [2 ,3 ]
机构：
[1] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China
[2] Westlake Univ, Sch Sci, 18 Shilongshan Rd, Hangzhou 310064, Peoples R China
[3] Westlake Inst Adv Study, Inst Nat Sci, 18 Shilongshan Rd, Hangzhou 310064, Peoples R China
[4] Zhejiang Univ, Dept Phys, Hangzhou 310027, Peoples R China
来源：
SCRIPTA MATERIALIA | 2020年 / 182卷 / 182期
关键词：
High-entropy alloys; Hexagonal structure; Superconductivity; MICROSTRUCTURE; TEMPERATURE; DEPENDENCE;
D O I：
10.1016/j.scriptamat.2020.03.004
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We report the superconducting properties of new hexagonal Nb10+2xMo35-xRu35-xRh10Pd10 high-entropy alloys (HEAs) (0 <= x <= 5). With increasing x, the superconducting transition temperature T, shows a maximum of 6.19 K at x = 2.5, while the zero-temperature upper critical field B-c2 (0) increases monotonically, reaching 8.3 T at x = 5. For all x values, the specific heat jump deviates from the Bardeen-Cooper-Schreiffer behavior. In addition, we show that T-c of these HEAs is not determined mainly by the density of states at the Fermi level and would be enhanced by lowering the valence electron concentration. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：109 / 113
页数：5
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