SCALING OF THE ANGULAR-DEPENDENCE OF THE CRITICAL-CURRENT DENSITY IN HIGH-TC SUPERCONDUCTORS

We report a general scaling behavior of the dependence of the critical current density j(c)(B, T, THETA) on the direction of the magnetic fi eld at low temperatures in c-axis-oriented high-T(c) superconductor th in films with different strengths of interlayer coupling. Measurements of j(c)(B, T, THETA) for pure YBa2Cu3O7, doped YBa2(Cu1-xZnx)3O7, Bi2 Sr2CaCu2O8, and YBa2Cu3O7/PrBa2Cu3O7 superlattice films with different relative orientations of the current j, magnetic field B, and crystal lographic direction c allow the identification of the dissipation caus ed by flux parallel to the superconducting layers moving in the c dire ction.