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

doi:10.1016/j.jpcs.2006.01.071

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

Research output: Contribution to journal › Article › peer-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 N_EF=0.148 states eV^-1 (Si-atom)^-1 and a discrete jump of C_p at the superconducting transition temperature ΔC_p=0.272 J K^-1 mol^-1 are obtained. The exponential fit of C_p 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 language	English
Pages (from-to)	1334-1337
Number of pages	4
Journal	Journal of Physics and Chemistry of Solids
Volume	67
Issue number	5-6
DOIs	https://doi.org/10.1016/j.jpcs.2006.01.071
Publication status	Published - 2006 May

Keywords

D. Superconductivity
Magnetic properties
Phonons
Specific heat

ASJC Scopus subject areas

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

Access to Document

10.1016/j.jpcs.2006.01.071

Cite this

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

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, vol. 67, no. 5-6, pp. 1334-1337. https://doi.org/10.1016/j.jpcs.2006.01.071

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title = "Specific heat capacity and magnetic susceptibility of superconducting Ba24Si100",

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.",

keywords = "D. Superconductivity, Magnetic properties, Phonons, Specific heat",

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

note = "Funding Information: The synchrotron radiation experiments were performed by the approval of the Japan Synchrotron Radiation Research Institute (JASRI) as Nanotechnology Support Project. This work was supported by Creation of Nano Devices and Systems Based on New Physical Phenomena and Functional Principles of CREST of JST. The present work is also partially supported by the Tohoku University 21 century COE program {\textquoteleft}Particle-Matter Hierarchy{\textquoteright} of MEXT, Japan. This work was performed by a Grant-in-Aid from the Ministry of Education, Culture, Sports, Science and Technology of Japan, Nos. 13304031, 17038801 and 17710088.",

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doi = "10.1016/j.jpcs.2006.01.071",

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T1 - Specific heat capacity and magnetic susceptibility of superconducting Ba24Si100

AU - Rachi, Takeshi

AU - Tanigaki, Katsumi

AU - Kumashiro, Ryotaro

AU - Kobayashi, Kensuke

AU - Yoshino, Harukazu

AU - Murata, Keizo

AU - Fukuoka, Hiroshi

AU - Yamanaka, Syoji

AU - Shimotani, Hidekazu

AU - Takenobu, Taishi

AU - Iwasa, Yoshihiro

AU - Sasaki, Takahiko

AU - Kobayashi, Norio

AU - Miyazaki, Yuji

AU - Saito, Kazuya

N1 - Funding Information: The synchrotron radiation experiments were performed by the approval of the Japan Synchrotron Radiation Research Institute (JASRI) as Nanotechnology Support Project. This work was supported by Creation of Nano Devices and Systems Based on New Physical Phenomena and Functional Principles of CREST of JST. The present work is also partially supported by the Tohoku University 21 century COE program ‘Particle-Matter Hierarchy’ of MEXT, Japan. This work was performed by a Grant-in-Aid from the Ministry of Education, Culture, Sports, Science and Technology of Japan, Nos. 13304031, 17038801 and 17710088.

PY - 2006/5

Y1 - 2006/5

N2 - 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.

AB - 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.

KW - D. Superconductivity

KW - Magnetic properties

KW - Phonons

KW - Specific heat

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