Journal
SCRIPTA MATERIALIA
Volume 182, Issue -, Pages 109-113Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2020.03.004
Keywords
High-entropy alloys; Hexagonal structure; Superconductivity
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Funding
- foundation of Westlake University
- National Key Research Development Program of China [2017YFA0303002]
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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.
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