High-entropy alloy superconductors on an α-Mn lattice

Karoline Stolze, F. Alex Cevallos, Tai Kong, Robert J. Cava

Research output: Contribution to journalArticle

15 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)10441-10449
Number of pages9
JournalJournal of Materials Chemistry C
Volume6
Issue number39
DOIs
StatePublished - Jan 1 2018

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

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