ANGULAR-DEPENDENCE OF CRITICAL CURRENTS OF HIGH-TEMPERATURE SUPERCONDUCTING FILMS IN HIGH MAGNETIC-FIELDS PREPARED BY METALORGANIC DEPOSITION

Critical current measurements have been obtained as a function of angle of the magnetic field to the plane of the thin film metalorganic deposited YBa2Cu3O7-x (YBCO). In the present measurements the current flowed in the a,b plane and was always perpendicular to the applied field. In contrast to the usual observations that show a maximum critical current for H parallel-to a,b and a minimum with H parallel-to c these new measurements of films with a high critical current density show a secondary maximum with this latter field orientation. Adaptation of a model for angular torque dependence gives a qualitative understanding of the results.