Phase decomposition and structural defects in a Y-Ba-Cu-O superconductor

Publication Type
Journal Article
Authors
DOI
10.1063/1.104126
Abstract
Phase decomposition of a bulk Y2Ba4Cu 8O16 superconductor has been studied. The microstructure of the sample is heavily faulted and contains many stacking defects, including a new "125" structure. It is likely that these fine-scale (10-30 Å thick) stacking defects are responsible for the significantly improved flux pinning in the phase-decomposed sample. It is proposed that the decomposition process begins with the reaction "248" 0><fv/0 "123"+"125", which could possibly occur by a spontaneous, short-range diffusion reaction. Further decomposition involves gradual removal of the extra CuO chains by long-range diffusion to produce a mixture of "123"+CuO.
Notes
cited By 46
Journal
Applied Physics Letters
Volume
57
Year of Publication
1990
Number
14
Pagination
1458-1460
ISSN Number
00036951
Research Areas
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