Scaling of current-voltage curves of Bi-2212 tape wire

摘要

The current-voltage curves are measured for a dip-coated Bi-2212 tape wire at various temperatures under the magnetic field parallel to the c-axis. It is found that the current-voltage curves are approximately scaled on two master curves by normalizing as predicted in the vortex glass-liquid transition theory. However, the obtained dynamic critical index was about 3 and too small in spite of the two-dimensional flux line system. These results are compared with the theoretical analysis based on the flux creep-flow model taking account of the distribution of pinning strength. It is found that the theoretical result approximately explains the experimental result on the scaling behavior, the critical indices and the transition line