Phase Stability of Cubic Pyrochlore Rare Earth Tantalate Pinning Additives in YBa2Cu3O7−δ Superconductor

Phase Stability of Cubic Pyrochlore Rare Earth Tantalate Pinning Additives in YBa2Cu3O7−δ Superconductor

Phase stability of cubic‐pyrochlore‐structured RE3TaO7 (RTO, where RE = rare earth elements) pinning additives in YBa2Cu3O7−δ (YBCO) superconductor and the pinning properties influenced by RTO addition into YBCO films were investigated. RTO completely reacts with YBCO and is converted to cubic‐doubl...

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Bibliographic Details
Published in:Journal of the American Ceramic Society Vol. 95; no. 4; pp. 1174 - 1177
Main Authors: Wee, Sung Hun, Cantoni, Claudia, Zuev, Yuri L., Specht, Eliot D., Goyal, Amit
Format: Journal Article
Language:English
Published: Blackwell Publishing Ltd 01-04-2012
Subjects:
COMPOSITES
COPPER OXIDE
DOPING
MICROSTRUCTURES
Nanocomposites
Nanostructure
Phase stability
PHASE STABILIZATION
PHASES
PINNING
Rare earth metals
RARE EARTHS
SUPERCONDUCTORS
Tantalates
YBCO superconductors
YTTRIUM OXIDE
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Summary:Phase stability of cubic‐pyrochlore‐structured RE3TaO7 (RTO, where RE = rare earth elements) pinning additives in YBa2Cu3O7−δ (YBCO) superconductor and the pinning properties influenced by RTO addition into YBCO films were investigated. RTO completely reacts with YBCO and is converted to cubic‐double‐perovskite‐structured Ba2RETaO6 (BRETO), a more thermodynamically stable tantalate phase within YBCO. In RTO‐doped YBCO films, BRETO self‐assembled nanocolumns align along the c‐axis of the film and play a major role in the improvement of flux pinning and Jc performance over wide magnetic field and angular ranges.
Bibliography:ORNL's Shared Research Equipment (SHaRE) User Facility
ark:/67375/WNG-PFVF74KB-M
ArticleID:JACE5084
istex:B85CCBC00472830B02A9E6D9A1DABC300E174F8D
U.S. DOE Office of Electricity Delivery and Energy Reliability-Advanced Cables and Conductors - No. DE-AC05-00OR22725
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1551-2916.2012.05084.x