Superconducting Transitions of BiSrCaCu2Ox Quenched from High Temperatures
- 1 July 1988
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 27 (7A) , L1237
- https://doi.org/10.1143/jjap.27.l1237
Abstract
The BiSrCaCu2O x specimens have been quenched from various elevated temperatures (200°C ∼860°C) to liquid nitrogen. The X-ray diffraction study revealed that the crystalline structure of specimens is essentially tetragonal. We found that the lower T c as well as the higher T c vary remarkably but differently as a function of a quenching temperature T q. We present evidence that the opposite T c variation observed between 400°C and 700°C cannot be attributed to a microscopic interaction between two phases but might be inherent.Keywords
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