Flux pinning enhancement in melt processed YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} through rare-earth ion (Nd, La) substitutions
- Department of Chemical Engineering, University of Notre Dame, Notre Dame, Indiana 46556 (United States)
Stoichiometric YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} (Y123) samples doped with excess Nd{sub 2}O{sub 3} and La{sub 2}O{sub 3} additions were melt processed in air. Because decomposition and reformation of 123 occurs during melt processing, lighter rare-earth ion substitution in 123 takes place. As the lighter rare-earth ion sizes (Nd, La) are comparable to that of Ba{sup 2+}, in addition to Y ion site substitution, partial substitution into the Ba{sup 2+} sites is also anticipated. The {ital T}{sub {ital c}} and magnetic properties of lighter rare-earth oxide doped samples were analyzed and compared with undoped Y123 to investigate the flux pinning enhancement due to these substitutions. The lighter rare-earth oxide doped, melt processed 123 shows significant improvement in magnetization compared to undoped samples, which is likely due to point defects created by partial substitutions of the lighter rare-earth ions. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.
- Research Organization:
- Purdue Research Foundation
- DOE Contract Number:
- FG02-90ER45427
- OSTI ID:
- 95463
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 7 Vol. 67; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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