Abstract
The dependence of the critical current density on the orientation of the magnetic field has been measured for a bicrystal film. When the field is rotated in the plane of the grain boundary, displays a maximum for close to the axis in fields up to 7 tesla. The same experiment performed in the interior of the grain shows no maximum. The pinning force at the maximum varies as , consistent with vortex pinning by a dense planar distribution of line pins. These results are a clear demonstration of flux pinning by dislocations in low-angle grain boundaries.
- Received 27 October 1997
DOI:https://doi.org/10.1103/PhysRevLett.80.3855
©1998 American Physical Society