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Grain boundary in textured YBa2Cu3O7−δ superconductor

Published online by Cambridge University Press:  31 January 2011

Yimei Zhu ,
H. Zhang ,
H. Wang  and
M. Suenaga
Yimei Zhu
Affiliation:
Division of Materials Science, Brookhaven National Laboratory, Upton, New York 11973
H. Zhang
Affiliation:
Department of Materials Science, State University of New York–Stony Brook, Stony Brook, New York 11794
H. Wang
Affiliation:
Department of Materials Science, State University of New York–Stony Brook, Stony Brook, New York 11794
M. Suenaga
Affiliation:
Division of Materials Science, Brookhaven National Laboratory, Upton, New York 11973
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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.

Type
Articles
Information
Journal of Materials Research , Volume 6 , Issue 12 , December 1991 , pp. 2507 - 2518
Copyright
Copyright © Materials Research Society 1991

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