Grain boundary in textured YBa2Cu3O7−δ superconductor
- 1 December 1991
- journal article
- Published by Springer Nature in Journal of Materials Research
- Vol. 6 (12) , 2507-2518
- https://doi.org/10.1557/jmr.1991.2507
Abstract
The misorientations of over 200 pairs of adjacent grains separated by grain boundaries in textured YBa2Cu3O7−δ were measured using a transmission electron microscopy technique. The results indicate that there exist discrete preferred rotation angles and rotation axes. The existence of low-energy boundaries is inferred. The results are analyzed based on the Constrained Coincidence Site Lattice (CCSL) and O2-lattice theories and imply the applicability of such theories for the case of large-angle grain boundaries in a complex crystal structure such as YBa2Cu3O7−δ. The results of analysis also show that some boundaries are likely to be reduced in oxygen near the boundary to satisfy the constraint of the coincidence site lattice.Keywords
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