Abstract
A tilt angle dependence of vortex structure was studied at low-angle grain boundaries (LAGBs) in $\mathrm{Y}{\mathrm{Ba}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7\ensuremath{-}x}$ films. The 2\ifmmode^\circ\else\textdegree\fi{} tilt LAGB did not degrade ${J}_{c}$ of the film in a self-field, demonstrating the existence of Abrikosov vortices at the 2\ifmmode^\circ\else\textdegree\fi{} LAGB. The magnetic field dependence of the flux flow resistance indicated the existence of Abrikosov Josephson vortices at the 5\ifmmode^\circ\else\textdegree\fi{} tilt LAGB. At the 10\ifmmode^\circ\else\textdegree\fi{} tilt LAGB, a Josephson junction behavior was observed in a self-field, indicating the existence of Josephson vortices. The influence of the LAGBs on critical current density was understood based on these vortices.
Published Version
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