Specific Heat and Superconductivity of Ba<SUB>2</SUB>YCu<SUB>3</SUB>O<I><SUB>y</SUB></I>
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- Kitazawa Koichi
- Department of Industrial Chemistry, University of Tokyo
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- Atake Tooru
- Research Laboratory of Engineering Materials, Tokyo Institute of Technology
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- Ishii Hideo
- Department of Applied Physics, University of Tokyo
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- Sato Hisashi
- Department of Applied Physics, University of Tokyo
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- Takagi Hidenori
- Department of Applied Physics, University of Tokyo
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- Uchida Shin-ichi
- Department of Applied Physics, University of Tokyo
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- Saito Yasutoshi
- Research Laboratory of Engineering Materials, Tokyo Institute of Technology
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- Fueki Kazuo
- Department of Industrial Chemistry, University of Tokyo
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- Tanaka Shoji
- Department of Applied Physics, University of Tokyo
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説明
The specific heat measurement was performed on recently discovered oxide superconductor Ba2YCu3Oy with Tc above liquid nitrogen temperature. A clear specific heat jump, at least 2 J/mol K, was observed at around 92 K, which provides electronic specific heat coefficient of 15 mJ/mol K2 in the weak coupling limit. The obtained γ is rather low in view of the high Tc of 90 K range. This leads us to postulate that the superconductivity in this oxide system is brought about by some mechanism other than conventional phonon mediated BCS theory.
収録刊行物
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- Japanese Journal of Applied Physics
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Japanese Journal of Applied Physics 26 (5), L748-L750, 1987
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詳細情報 詳細情報について
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- CRID
- 1571980077242789248
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- NII論文ID
- 110003926249
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- NII書誌ID
- AA10650595
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- 本文言語コード
- en
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- データソース種別
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