Effect of extremely fine Y{sub 2}BaCuO{sub 5} precipitates on the critical current density of melt-processed YBa{sub 2}Cu{sub 3}O{sub x}
- Superconductive Components, Inc., 1145 Chesepeake Avenue, Columbus, Ohio 43212 (United States)
- Department of Materials Science, University of Cincinnati, Cincinnati, Ohio 45221 (United States)
- Materials Science Division, Argonne National Laboratory, Argonne, Ilinois 60439 (United States)
- Department of Chemical Engineering, University of Nortre Dame, Notre Dame, Indiana 46556 (United States)
Based on previously developed melt processing methods, Y{sub 2}BaCuO{sub 5} (211) precipitates with various size were obtained in YBa{sub 2}Cu{sub 3}O{sub x} (123). In particular, a wide distribution of 211 size from 100 {Angstrom} to 10 {mu}m has been found to exist in the matrix of 123, and strongly effected the critical current density, J{sub c}. An enhancement of J{sub c} was always found to be associated with the presence of extremely fine 211 precipitates. The flux pinning by these precipitates can be understood by considering the interaction of flux lines with cavities. It was found that although the flux lines are strongly pinned by cavities, the effectiveness decreases with the increasing number of flux lines trapped by them. {copyright} {ital 1997 American Institute of Physics.}
- Research Organization:
- Purdue Research Foundation
- DOE Contract Number:
- FG02-90ER45427; W-31109-ENG-38
- OSTI ID:
- 503596
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 11 Vol. 81; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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