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

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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 1

Keywords

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

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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    Rachi, T., Tanigaki, K., Kumashiro, R., Kobayashi, K., Yoshino, H., Murata, K., Fukuoka, H., Yamanaka, S., Shimotani, H., Takenobu, T., Iwasa, Y., Sasaki, T., Kobayashi, N., Miyazaki, Y., & Saito, K. (2006). Specific heat capacity and magnetic susceptibility of superconducting Ba24Si100. Journal of Physics and Chemistry of Solids, 67(5-6), 1334-1337. https://doi.org/10.1016/j.jpcs.2006.01.071