Abstract
High performance of the critical current density Jc in Y1Ba2Cu3O7 films prepared by chemical vapor deposition has been demonstrated. The pinning mechanism in high-Tc superconducting oxides was explored from a viewpoint of the anisotropic behavior of Jc, and the global pinning force Fp was investigated in terms of the flux creep. It was found that the global pinning force on the basis of the flux creep theory well describes the Jc properties in CVD-Y1Ba2Cu3O7 films. The scaling in the form Fp∝(B/Bc2)1/2(1-B/Bc2)3/2 of the unrelaxed state which is not limited by the flux creep was presented.
