Superconductivity in the niobium-rich compound Nb5Se4

T. Klimczuk, K. Baroudi, J. W. Krizan, A. L. Kozub, R. J. Cava

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Abstract The niobium rich selenide compound Nb5Se4 was synthesized at ambient pressure by high-temperature solid-state reaction in a sealed Ta tube. Resistivity and heat capacity measurements reveal that this compound is superconducting, with a Tc = 1.85K. The electronic contribution to the specific heat γ and the Debye temperature are found to be 18.1 mJmol-1K-2 and 298 K respectively. The calculated electron-phonon coupling constant λep = 0.5 and the ΔCp/γTc = 1.42 ratio imply that Nb5Se4 is a weak coupling BCS superconductor. The upper critical field and coherence length are found to be 1.44 T and 15.1 nm, respectively.

Original languageEnglish (US)
Article number34899
Pages (from-to)906-909
Number of pages4
JournalJournal of Alloys and Compounds
Volume649
DOIs
StatePublished - Aug 4 2015

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Keywords

  • Heat capacity
  • Solid state reaction
  • Superconductors
  • X-ray diffraction

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