Physica C: Superconductivity 341-348, 1187 (2000)
Alexey V. Pan and Pablo Esquinazi
Abstract
With the vibrating reed technique, we have measured an increase in the elastic coupling between the flux line lattice (FLL) and pinning centers in field-cooled YBa2Cu3O7 superconducting films by loading them with a dc driving current. This result, obtained at different magnetic field orientations, implies a plastic rearrangement of the FLL to a more disordered and stronger pinned configuration at temperatures and fields far below the thermally activated depinning transition and at driving currents orders of magnitude lower than the critical one.
