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Combined effect of a single grain boundary and artificial pinning centers on the critical current density in a YBa2Cu3O7-δ thin film

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6 Author(s)
Horide, T. ; Department of Materials Science and Engineering, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan ; Matsumoto, K. ; Yoshida, Y. ; Mukaida, M.
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The combined effect of a single grain boundary and artificial pinning centers (APCs) on the critical current density (Jc) in YBa2Cu3O7-δ thin films was investigated. The authors decorated the surface of a 5°-tilt bicrystal SrTiO3 substrate with Y2O3 nanoislands to introduce APCs into the film. Jc of the bicrystal YBa2Cu3O7-δ film with APCs was measured in various magnetic fields. The APCs improved Jc in high magnetic fields, but not in low magnetic fields due to the existence of the grain boundary. The limiting mechanism of Jc in the bicrystal film containing APCs is discussed based on the experimental results.

Published in:
Applied Physics Letters  (Volume:89 ,  Issue: 17 )

Date of Publication: Oct 2006

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