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Sc–Zr–Nb–Rh–Pd and Sc–Zr–Nb–Ta–Rh–Pd High-Entropy Alloy Superconductors on a CsCl-Type Lattice
Open accessAbstract
We have synthesized previously unreported high-entropy alloys (HEAs) in the pentanary (ScZrNb) 1– x [RhPd] x and hexanary (ScZrNbTa) 1– x [RhPd] x systems. The materials have CsCl-type structures and mixed site occupancies. Both HEAs are type-II superconductors with strongly varying critical temperatures ( T c ’s) depending on the valence electron count (VEC); the T c ’s increase monotonically with decreasing VEC within each series, and do not follow the trends seen for either crystalline or amorphous transition metal superconductors. The (ScZrNb) 0.65 [RhPd] 0.35 HEA with the highest T c, ∼9.3 K, also exhibits the largest μ 0 H c2 (0) = 10.7 T. The pentanary and hexanary HEAs have higher superconducting transition temperatures than their simple binary intermetallic relatives with the CsCl-type structure and a surprisingly ductile mechanical behavior. The presence of niobium, even at the 20% level, has a positive impact on the T c . Nevertheless, niobium-free (ScZr) 0.50 [RhPd] 0.50, as mother-compound of both superconducting HEAs found here, is itself superconducting, proving that superconductivity is an intrinsic feature of the bulk material.
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“The VEC dependence of T c in these systems does not conform to the behavior observed in either crystalline or amorphous transition metal superconductors.”
From Recent advances in high-entropy superconductors (2024) · cites this paper as [47]
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“The (NbZrSc)0.65(PdRh)0.35 HEA has a maximum T c of approximately 9.3 K and has the largest μ 0Hc2(0) of 10.7 T, which is similar to that of the NbTi superconductor 47 .”
From Recent advances in high-entropy superconductors (2024) · cites this paper as [47]
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“Superconductivity in CsCl-type HEAs was fi rst reported in hexanal (TaNbZrSc)1x (PdRh) x and (NbZrSc)1x (PdRh) x samples 47 .”
From Recent advances in high-entropy superconductors (2024) · cites this paper as [47]
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Mechanical behavior of high-entropy alloys
Li, W., Xie, D., Li, D., Zhang, Y., Gao, Y., & Liaw, P. K. (2021) · Progress in Materials Science · doi:10.1016/j.pmatsci.2021.100777 · Cited by 1,351
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High-entropy functional materials
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Self-citation
Metadata
- Authors
- Stolze, K., Tao, J., von Rohr, F. O., Kong, T., & Cava, R. J.
- Affiliations
- Princeton University (US)
- Brookhaven National Laboratory (US)
- Department of Chemistry, University of Zürich, CH-8057 Zürich, Switzerland
- Corresponding author
- Stolze, Karoline
- Cava, Robert J.
- Venue
- Chemistry of Materials
- Publisher
- American Chemical Society (ACS)
- Published
- 2018-02-02
- Volume
- 30
- Issue
- 3
- Pages
- 906-914
- ISSN
- 0897-4756 (ISSN-L)
- 1520-5002
- OpenAlex
- W2783348740
- Cited by
- 122
- References
- 37
- Citations by year
- 2026: 4 · 2025: 20 · 2024: 18 · 2023: 17 · 2022: 26 · 2021: 15 · 2020: 13 · 2019: 6 · 2018: 3
- FWCI
- 5.91
- Type
- journal article
- Language
- en
- Open access
- green
- www.osti.gov
- Locations
- Chemistry of Materials (publishedVersion)
- Archive ouverte UNIGE (University of Geneva) (publishedVersion)
- OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
- Archive ouverte UNIGE (University of Geneva) (submittedVersion, cc-by)
- Zurich Open Repository and Archive (University of Zurich) (submittedVersion)
- Funders
- Gordon and Betty Moore Foundation (GBMF-4412)
- Basic Energy Sciences (DE-SC0012704)
- Topics
- Physical Sciences › Engineering › Mechanical Engineering › High Entropy Alloys Studies
- Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Physics of Superconductivity and Magnetism
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Superconducting Materials and Applications
- Keywords
- high-entropy alloys, superconductors, B2 phase, critical temperature, valence electron count, type-II superconductivity, upper critical field, ductility, niobium effect, intermetallic compounds, transition metal superconductors
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