Pinning Mechanism and Flux Motion in Yba2cu3o7 Thin Films

Abstract

The flux creep phenomena and the J(c) characteristics have been investigated in the YBa2Cu3O7 (YBCO) thin films grown by metal organics chemical vapor deposition (MOCVD) technique. The anisotropy of the current density (J(c)) is discussed on the basis of the intrinsic pinning model and the anisotropic critical magnetic field (H-c2). The properties of the high J(c) and the pinning energy are related with the fine precipitates observed by tunneling electron microscopy (TEM). The strong pinning mechanism affects the amount of the flux motion.