Abstract
Effect of misorientation angle on the critical current density across [1 0 0] tilt grain boundaries (GB) in YBa 2Cu 3O 7− δ (Y123) thin films grown by liquid phase epitaxy method is investigated. The inter-granular critical current density, J c GB , was determined from a standard four-probe transport measurement. We also evaluated J c GB value by using a magneto-optical imaging technique to evaluate J c GB more directly. Both measurements showed higher J c GB for lower-angle GB, implying that GB with low misorientation angle has stronger coupling.
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