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High-Entropy Alloy Superconductors on an α-Mn lattice

Abstract

Previously unreported High-Entropy Alloys (HEAs) in the pentanary (ZrNb)1-x[MoReRu]x, (HfTaWIr)1-x[Re]x, and (HfTaWPt)1-x[Re]x systems are described and characterized. The materials have body-centered cubic α-Mn-type structures and mixed site occupancies; a small stoichiometry range is observed for all, and the mixed 4d-5d system has less Re than is typically encountered for Re-containing materials with this structure type. The latter two systems are the first reported 5d-element-only superconducting HEAs. All are type-II bulk superconductors with strongly varying critical temperatures (Tcs) depending on the cubic lattice parameter a and the valence electron count (VEC); the Tcs increase linearly with decreasing a and increasing VEC within each series and fall between the trend lines found for crystalline and amorphous transition metal alloy superconductors.

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Publication details

The article was received on 06 Jul 2018, accepted on 09 Aug 2018 and first published on 09 Aug 2018


Article type: Paper
DOI: 10.1039/C8TC03337D
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    High-Entropy Alloy Superconductors on an α-Mn lattice

    K. Stolze, F. A. Cevallos, T. Kong and R. J. Cava, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC03337D

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