Angular dependence of the upper critical field and the critical current density for Y₁Ba₂Cu₃O_7-δ films

Resistive measurements for the angular dependence of both B_c2 and J_c were performed using high-J_c Y₁Ba ₂Cu₃O_7-δ films prepared by chemical vapor deposition. The angular dependence of B_c2 was described by the anisotropic Ginsburg-Landau theory with different masses for in-plane and out-of-plane. We found that the angular dependence of B_c2 largely contributes to the anisotropic J_c on the basis of the flux pinning scaling law.