Pinning of curved flux lines on the boundary between two phases of high temperature superconductors.

摘要

The distribution of the magnetic fields and the current density in a system of two phases of high temperature superconductors (HTS) are determined. Recently, this system has been confirmed experimentally. The energy of the interaction between curved flux lines (FLs) and the interface is calculated. It is shown that for positive (Delta)G (the change in the flux line (FL) energy at the Interface) the FLs will be pinned by the interface and the pinning force is formulated. Moreover, this force will be different according to the movement of the FL to the right or to the left. Agreements with the previous results (in special cases) are obtained. This study may serve to test the pinning experimentally. (author). 4 refs. (Atomindex citation 20:050697)