ANGULAR-DEPENDENCE OF TRANSPORT CURRENT NEAR-CRITICAL AT FIELDS TO 4-T IN METALORGANIC THIN-FILMS

Values of the transport current have been obtained as a function of an gle of the magnetic field to the plane of the thin film YBa2Cu3O7-d (Y BCO) prepared by metalorganic deposition. Current flowed in the a, b p lanes at various angles to the applied magnetic fields to 4.2 T. Films with thicknesses near 350 nm were studied. For these thin films and H \\ c a secondary maximum is observed when J(c) > 1 MA/cm2. Near H \\ a, b a large increase in I(c) is observed, and the sharpness, field de pendence, and field directional dependence is discussed. The response to currents above I(c) is determined and the fit to a power law V appr oximately I(n) shows a strong correlation between I(c) and n.