Abstract
We measured the current-induced loss of vortex correlation in crystals using the pseudo-dc-flux-transformer geometry. We find that the current density at which the top and bottom voltage drops differ is a linear function of temperature, is independent of pinning, and depends on the thickness of the sample. This thickness dependence strongly suggests that the electrical current flows at the surface of the sample. The observed behavior with temperature, magnetic field, and thickness is described by a phenomenological model.
- Received 8 August 1994
DOI:https://doi.org/10.1103/PhysRevB.50.9684
©1994 American Physical Society