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Browse Journals & Magazines > Applied Physics Letters ...> Volume:65 Issue:12 Help

Transport through 90° [010] basal‐plane‐faced tilt and twist grain boundaries in YBa2Cu3O7-δ thin films

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5 Author(s)
Lew, D.J. ; Department of Applied Physics and Center for Materials Research, Stanford University, Stanford, California 94305‐4090 ; Suzuki, Y. ; Marshall, A.F. ; Geballe, T.H.
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We have fabricated controlled grain boundaries between a‐ and c‐axis films of YBa2Cu3O7-δ (YBCO). By selectively depositing c‐axis and in‐plane aligned a‐axis YBCO on the same substrate, we have grown nominally 90° [010] basal‐plane‐faced tilt and twist grain boundaries (BFGB’s and TGB’s) on LaSrGaO4 (LSGO) substrates and have studied their transport. We find that the TGB is very robust, exhibiting high critical current density Jc and weak field dependence, and is as well coupled as our [010] antiphase boundaries. The BFGB is not as strong, but couples better than high‐angle [001] tilt grain boundaries in c‐axis films. Although the BFGB’s do limit Jc, they do not reduce Jc by more than an order of magnitude and the field dependence is very weak. We discuss these grain boundaries in terms of weak links.

Published in:
Applied Physics Letters  (Volume:65 ,  Issue: 12 )

Date of Publication: Sep 1994

Page(s):
1584 - 1586
ISSN :
0003-6951
Digital Object Identifier :
10.1063/1.112969
Product Type:
Journals & Magazines
Date of Current Version :
18 June 2009
Issue Date :
Sep 1994

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