Bose-glass signatures in bulk YBa2Cu3O7−δ with periodic array of nanoscale twin boundaries
A periodic array of nanoscale twin boundaries (TBs) was formed inside melt-processed YBa2Cu3O7-delta (YBCO) with Ru additions. The pinning efficiency of the resulting material is strongly modified in the presence of such disorder. The arrangement of the regular TBs along the c-axis has a strong infl...
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Published in | Superconductor science & technology Vol. 19; no. 7; pp. S472 - S477 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
IOP Publishing
01.07.2006
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Online Access | Get full text |
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Summary: | A periodic array of nanoscale twin boundaries (TBs) was formed inside melt-processed YBa2Cu3O7-delta (YBCO) with Ru additions. The pinning efficiency of the resulting material is strongly modified in the presence of such disorder. The arrangement of the regular TBs along the c-axis has a strong influence on the irreversibility line and critical current density. We found a characteristic kink at Bcr = 2.75 T on the c-axis irreversibility line, indicative of correlated disorder. The field tilt angle below which pinning by the TB is effective is found to be ~40 deg . Detailed investigations of glassy dynamics show that the TB structure that appears will inhibit the motion of vortices in the variable-range-hopping regime below the effective matching field. We have attempted to reconcile our data with the predictions of the Bose-glass model for correlated disorder. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0953-2048 1361-6668 |
DOI: | 10.1088/0953-2048/19/7/S10 |