Specific heat capacity and magnetic susceptibility of superconducting Ba24Si100

Takeshi Rachi*, Katsumi Tanigaki, Ryotaro Kumashiro, Kensuke Kobayashi, Harukazu Yoshino, Keizo Murata, Hiroshi Fukuoka, Syoji Yamanaka, Hidekazu Shimotani, Taishi Takenobu, Yoshihiro Iwasa, Takahiko Sasaki, Norio Kobayashi, Yuji Miyazaki, Kazuya Saito

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Physical properties of a new superconductor Ba24Si100 crystallographically identical to Ba24Ge100 are studied by electric transport, specific heat capacity and magnetic susceptibility measurements. The density of states at the Fermi level NEF=0.148 states eV-1 (Si-atom)-1 and a discrete jump of Cp at the superconducting transition temperature ΔCp=0.272 J K-1 mol-1 are obtained. The exponential fit of Cp under the superconducting states gives an energy gap 2Δ=0.423 meV and shows that this is a superconductor having an s-wave character or an isotropic energy gap. On the basis of the experimental data, other important physical parameters are also described.

Original languageEnglish
Pages (from-to)1334-1337
Number of pages4
JournalJournal of Physics and Chemistry of Solids
Volume67
Issue number5-6
DOIs
Publication statusPublished - 2006 May
Externally publishedYes

Keywords

  • D. Superconductivity
  • Magnetic properties
  • Phonons
  • Specific heat

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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