Superconductivity and physical properties of Ba24Si100 determined from electric transport, specific-heat capacity, and magnetic susceptibility measurements

Takeshi Rachi, Harukazu Yoshino, Ryotaro Kumashiro, Masaki Kitajima, Kensuke Kobayashi, Keiichi Yokogawa, Keizo Murata, Noriaki Kimura, Haruyoshi Aoki, Hiroshi Fukuoka, Syoji Yamanaka, Hidekazu Shimotani, Taishi Takenobu, Yoshihiro Iwasa, Takahiko Sasaki, Norio Kobayashi, Yuji Miyazaki, Kazuya Saito, Fangzhun Guo, Keisuke KobayashiKeiichi Osaka, Kenichi Kato, Masaki Takata, Katsumi Tanigaki

研究成果: Article査読

45 被引用数 (Scopus)

抄録

Both Ba24Si100 and Ba24Ge100 with crystallographically identical structure are found to be superconducting at 1.4 and 0.27 K, respectively. Physical properties of this superconductor Ba24Si100 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(Siatom)-1 and a distinct jump of Cp at the superconducting transition temperature ΔCp=0.272JK-1mol-1 are obtained. An exponential fit of Cp below the superconducting states gives an energy gap 2Δ=0.423meV and shows that this is a superconductor having s-wave character or isotropic energy gap. On the basis of our experimental data other important physical parameters are also derived.

本文言語English
論文番号144504
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
72
14
DOI
出版ステータスPublished - 2005 10 1
外部発表はい

ASJC Scopus subject areas

  • Condensed Matter Physics

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