Sc–Zr–Nb–Rh–Pd and Sc–Zr–Nb–Ta–Rh–Pd High-Entropy Alloy Superconductors on a CsCl-Type Lattice

Stolze, Karoline; Tao, Jing; von Rohr, Fabian O.; Kong, Tai; Cava, Robert J.

doi:10.1021/acs.chemmater.7b04578

Title: Sc–Zr–Nb–Rh–Pd and Sc–Zr–Nb–Ta–Rh–Pd High-Entropy Alloy Superconductors on a CsCl-Type Lattice

Abstract

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_cs) depending on the valence electron count (VEC); the T_cs 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 µ₀H_c2(0) = 10.7 T. The pentanary and hexanary HEAs have higher superconducting transition tempera-tures 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.

Authors:

^[1]; Tao, Jing ^[2]; von Rohr, Fabian O. ^[3]; Kong, Tai ^[1]; Cava, Robert J. ^[1]

Princeton Univ., NJ (United States). Dept. of Chemistry
Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Physics
Univ. of Zurich (Switzerland). Dept. of Chemistry

Publication Date:: 2018-01-17

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1433996

Report Number(s):: BNL-203546-2018-JAAM
Journal ID: ISSN 0897-4756; TRN: US1802669

Grant/Contract Number:: SC0012704; GBMF-4412

Resource Type:: Accepted Manuscript

Journal Name:: Chemistry of Materials

Additional Journal Information:: Journal Volume: 30; Journal Issue: 3; Journal ID: ISSN 0897-4756

Publisher:: American Chemical Society (ACS)

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats


                    Stolze, Karoline, Tao, Jing, von Rohr, Fabian O., Kong, Tai, and Cava, Robert J. Sc–Zr–Nb–Rh–Pd and Sc–Zr–Nb–Ta–Rh–Pd High-Entropy Alloy Superconductors on a CsCl-Type Lattice.  United States: N. p., 2018. 
        Web.  doi:10.1021/acs.chemmater.7b04578.

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                    Stolze, Karoline, Tao, Jing, von Rohr, Fabian O., Kong, Tai, & Cava, Robert J. Sc–Zr–Nb–Rh–Pd and Sc–Zr–Nb–Ta–Rh–Pd High-Entropy Alloy Superconductors on a CsCl-Type Lattice.  United States.  doi:https://doi.org/10.1021/acs.chemmater.7b04578

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                    Stolze, Karoline, Tao, Jing, von Rohr, Fabian O., Kong, Tai, and Cava, Robert J. Wed .  
        "Sc–Zr–Nb–Rh–Pd and Sc–Zr–Nb–Ta–Rh–Pd High-Entropy Alloy Superconductors on a CsCl-Type Lattice".  United States.  doi:https://doi.org/10.1021/acs.chemmater.7b04578.  https://www.osti.gov/servlets/purl/1433996.

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@article{osti_1433996,

  title        = {Sc–Zr–Nb–Rh–Pd and Sc–Zr–Nb–Ta–Rh–Pd High-Entropy Alloy Superconductors on a CsCl-Type Lattice},

  author       = {Stolze, Karoline and Tao, Jing and von Rohr, Fabian O. and Kong, Tai and Cava, Robert J.},

  abstractNote = {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 (Tcs) depending on the valence electron count (VEC); the Tcs 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 Tc, ~9.3 K, also exhibits the largest µ0Hc2(0) = 10.7 T. The pentanary and hexanary HEAs have higher superconducting transition tempera-tures 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 Tc. 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.},

  doi          = {10.1021/acs.chemmater.7b04578},

  journal      = {Chemistry of Materials},

  number       = 3,

  volume       = 30,

  place        = {United States},

  year         = {2018},

  month        = {1}

}

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DOI: https://doi.org/10.1021/acs.chemmater.7b04578

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Cited by: 3 works

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Figures / Tables:

Table 1: Transition metal element and binary alloy superconductors with the body-centered cubic structure, and superconducting binary intermetallic AB compounds with the CsCl-type cubic primitive structure, T_c ≥ 2 K.

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Works referencing / citing this record:

Superconductivity in a new hexagonal high-entropy alloy
journal, June 2019

Marik, Sourav; Motla, Kapil; Varghese, Maneesha
Physical Review Materials, Vol. 3, Issue 6
DOI: 10.1103/physrevmaterials.3.060602

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Physical Review Materials, Vol. 3, Issue 6
DOI: 10.1103/physrevmaterials.3.060602

Polymorphism and superconductivity in the V-Nb-Mo-Al-Ga high-entropy alloys
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Wu, Jifeng; Liu, Bin; Cui, Yanwei
Science China Materials, Vol. 63, Issue 5
DOI: 10.1007/s40843-019-1237-5

High-entropy alloy superconductors on an α-Mn lattice
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Stolze, Karoline; Cevallos, F. Alex; Kong, Tai
Journal of Materials Chemistry C, Vol. 6, Issue 39
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Pressure effects on the electronic structure and superconductivity of ${(TaNb)}_{0.67} {(HfZrTi)}_{0.33}$ high entropy alloy
journal, November 2019

Jasiewicz, K.; Wiendlocha, B.; Górnicka, K.
Physical Review B, Vol. 100, Issue 18
DOI: 10.1103/physrevb.100.184503

High-entropy alloy superconductors: Status, opportunities, and challenges
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Sun, Liling; Cava, R. J.
Physical Review Materials, Vol. 3, Issue 9
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High-entropy functional materials
journal, September 2018

Gao, Michael C.; Miracle, Daniel B.; Maurice, David
Journal of Materials Research, Vol. 33, Issue 19
DOI: 10.1557/jmr.2018.323

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Title: Sc–Zr–Nb–Rh–Pd and Sc–Zr–Nb–Ta–Rh–Pd High-Entropy Alloy Superconductors on a CsCl-Type Lattice

Abstract

Citation Formats

Figures / Tables:

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