Superconducting state in the ternary stannide R 3Co 4Sn 13 (R = Ca, La)

N. Kase, H. Hayamizu, K. Inoue, Jun Akimitsu

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Abstract

We observed the superconducting and normal state by using the single crystals of R 3 Co 4Sn 13 (R = Ca, La). The compounds crystallized in a Yb 3Rh 4Sn 13-type structure with a cubic space group of Pm3̄n (No. 223). Superconducting state of R 3Co 4Sn 13 was investigated by magnetic susceptibility, electrical resistivity, and specific heat measurements. From the electrical resistivity measurements under several magnetic fields, the upper critical field H c2(0) was estimated. From the results, we discovered that the H c2(T) curves cannot be described as the Wertharmer-Helfand-Hohenberg (WHH) prediction. Specific heat measurements indicated that these compounds were typical BCS superconductors, and categorized as strong-coupling superconductors.

Original languageEnglish
Pages (from-to)711-713
Number of pages3
JournalPhysica C: Superconductivity and its Applications
Volume471
Issue number21-22
DOIs
Publication statusPublished - Nov 2011
Externally publishedYes

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Keywords

  • Specific heat
  • Superconductivity
  • Transport properties

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Electronic, Optical and Magnetic Materials

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