| Autor: |
Liu, Bin, Wu, Jifeng, Cui, Yanwei, Zhu, Qinqing, Xiao, Guorui, Wu, Siqi, Cao, Guanghan, Ren, Zhi |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Scripta Materialia 182, 109 (2020) |
| Druh dokumentu: |
Working Paper |
| Popis: |
We report the superconducting properties of new hexagonal Nb$_{10+2x}$Mo$_{35-x}$Ru$_{35-x}$Rh$_{10}$Pd$_{10}$ high-entropy alloys (HEAs) (0 $\leq$ $x$ $\leq$ 5). With increasing $x$, the superconducting transition temperature $T_{\rm c}$ shows a maximum of 6.19 K at $x$ = 2.5, while the zero-temperature upper critical field $B_{\rm c2}$(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 $T_{\rm c}$ 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. |
| Databáze: |
arXiv |
| Externí odkaz: |
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