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

Physical Review B - Condensed Matter and Materials Physics Volume 72 Issue 14 Page 144504- published_at 2005-10
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Title ( eng )
Superconductivity and physical properties of Ba24Si100 determined from electric transport, specific-heat capacity, and magnetic susceptibility measurements
Creator
Rachi Takeshi
Yoshino Harukazu
Kumashiro Ryotaro
Katajima Masaki
Kobayashi Kensuke
Yokogawa Keiichi
Murata Keizo
Kimura Noriaki
Aoki Haruyoshi
Shimotani Hidekazu
Takenobu Taishi
Iwasa Yoshihiro
Sasaki Takahiro
Kobayashi Norio
Miyazaki Yuji
Saito Kazuya
Guo Fang Zhun
Kobayashi Keisuke
Osaka Keiichi
Kato Kenichi
Tanaka Masaki
Tanigaki Katsumi
Source Title
Physical Review B - Condensed Matter and Materials Physics
Volume 72
Issue 14
Start Page 144504
Abstract
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.
NDC
Physics [ 420 ]
Language
eng
Resource Type journal article
Publisher
American Physical Society
Date of Issued 2005-10
Rights
Copyright (c) 2005 American Physical Society
Publish Type Version of Record
Access Rights open access
Source Identifier
[NCID] AA11187113
[ISSN] 1098-0121
[DOI] 10.1103/PhysRevB.72.144504
[DOI] http://dx.doi.org/10.1103/PhysRevB.72.144504