Superconducting properties of Ca 3T 4Sn 13 (T = Co, Rh, and Ir)

Hiroki Hayamizu, Naoki Kase, Jun Akimitsu

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We present the results of the superconducting properties of R 3Ti 4Sn 13 (R = La, Sr, and Ca; T = Co, Rh, and Ir) with quasi skutterudite structure by means of magnetic susceptibility, electrical resistivity, and specific heat measurements. It is shown that the superconductivity is of conventional s-wave type and lies in the extremely strong-coupling regime. Electron-phonon coupling constants λ ep were estimated to be almost 1 for R 3Ti 4Sn 13, respectively. The result can be categorized as a strong-coupling superconductor; this categorization is in good agreement with the results of specific heat measurements. The λ ep and the electronic density of states at the Fermi level (N(E F)) increases with the superconducting transition temperature. However, superconducting transition temperature of Co-compound cannot be explained by the difference of N(E F). From these results, we concluded that T c of R 3Ti 4Sn 13 can be described by the strength of the λ ep.

Original languageEnglish
Article numberSA114
JournalJournal of the Physical Society of Japan
Volume80
Issue numberSUPPL. A
DOIs
Publication statusPublished - Jul 2011
Externally publishedYes

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heat measurement
transition temperature
specific heat
superconductivity
magnetic permeability
electrical resistivity
electronics
electrons

Keywords

  • Specific heat
  • Strong-coupling superconductor
  • Superconductivity

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Superconducting properties of Ca 3T 4Sn 13 (T = Co, Rh, and Ir). / Hayamizu, Hiroki; Kase, Naoki; Akimitsu, Jun.

In: Journal of the Physical Society of Japan, Vol. 80, No. SUPPL. A, SA114, 07.2011.

Research output: Contribution to journalArticle

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