1. Direct evidence for an effect of twin boundaries on flux pinning in single-crystalYBa2Cu3O6+x
- Author
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L. J. Swartzendruber, Lawrence H. Bennett, Kaiser Dl, Frank W. Gayle, and A. Roitburd
- Subjects
Superconductivity ,Crystal ,Magnetization ,Flux pinning ,Materials science ,Condensed matter physics ,Condensed Matter::Superconductivity ,General Physics and Astronomy ,Crystal twinning ,Anisotropy ,Pinning force ,Single crystal - Abstract
Magnetization measurements are reported on a nearly cubic single crystal YBa{sub 2}Cu{sub 3}O{sub 6+{ital x}} which displays predominantly one variant of twin boundary. With this crystal, we were able to compare the effects of different vortex and twin-boundary orientations on magnetic behavior. The results demonstrate that there is a measurable effect due direct pinning of vortices by twin boundaries for applied fields perpendicular to the {ital c} axis. We also show that the large anisotropy in flux pinning for applied fields parallel and perpendicular to the {ital c} axis is not due to pinning by twin boundaries.
- Published
- 1990