Specific Heat and Superconductivity of Ba2YCu3Oy
- 1 May 1987
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 26 (5A) , L748
- https://doi.org/10.1143/jjap.26.l748
Abstract
The specific heat measurement was performed on recently discovered oxide superconductor Ba2YCu3O y with T c 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 T c 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.Keywords
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