Critical current anisotropy of BiSrCaCuO thin films under magnetic fields

Abstract
The authors report on the strong angular dependence under magnetic field of the critical currents of c-axis oriented Bi2Sr2CaCu2O8 thin films, measured as a function of the angle theta between the c-axis and the applied magnetic field (H0.02 T, it is shown that Jc(H, theta ) behaves as mod Hcos theta mod - alpha with 0.44<or= alpha <or=0.50.