Abstract
The intrinsic pinning in twinned and untwinned single-crystal is observed using a novel crossed-magnetic-field technique for obtaining angular resolutions of Δθ<0.005°. The pinning occurs for magnetic-field directions within a critical angle <1° of the Cu-O planes. The data are discussed in the context of a lock-in transition of vortices in the a-b plane of the crystal.
- Received 29 April 1991
DOI:https://doi.org/10.1103/PhysRevLett.67.390
©1991 American Physical Society