Twin structures, transformation and symmetry of superconducting Y1Ba2Cu3O7–x, observed by transmission electron microscopy
- 1 March 1988
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine Letters
- Vol. 57 (3), 157-163
- https://doi.org/10.1080/09500838808203765
Abstract
The disappearance of microtwins in the high- Tc, superconductor Y1Ba2Cu3O7–x under the influence of electron irradiation is reported, and is shown to occur when the structure transforms from the orthorhombic to the tetragonal phase. Convergent-beam electron diffraction studies establish the crystallography of this transformation. The observations are explained in terms of an increase in x under electron irradiation. The space group of the orthorhombic structure is determined as Pm2m.Keywords
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