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.
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Zhu, Y., Zhang, H., Wang, H. et al. Grain boundary in textured YBa2Cu3O7−δ superconductor. Journal of Materials Research 6, 2507–2518 (1991). https://doi.org/10.1557/JMR.1991.2507
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DOI: https://doi.org/10.1557/JMR.1991.2507