Phase Transformation in the Superconductor Ba-Y-Cu-O and La-Sr-Cu-O Compounds
- 1 July 1987
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 26 (7A), L1202-1204
- https://doi.org/10.1143/jjap.26.l1202
Abstract
The change of microstructure with phase transformation in the superconductor Ba-Y-Cu-O and La-Sr-Cu-O compounds are studied by in situ observation using a transmission electron microscope equipped with heating and cooling goniometer stages. It is confirmed in the Ba-Y-Cu-O system that tetragonal phase is transformed to the orthorhombic phase with (110) internal twins. In the La-Sr-Cu-O system, twins are also observed to appear on cooling, accompanied by the phase transformation, while they disappear reversibly on heating.Keywords
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