Anisotropy and vortex behaviour in BiSrCaCuO thin films and multilayers probed by columnar pinning centers

摘要

In this paper we review typical mixed state transport results obtained on a variety of Bi_2Sr_2Ca_(n-1), Cu_nO_y thin films and artificial multilayers, which allowed us to cover the range from low to high anisotropy. The vortex behaviour, 2D or 3D, probed by the pinning properties of columnar defects, is shown to be highly dependant on the anisotropy, and therefore on the microstructure of the system.