Variety of the Flux Pinning State Diagrams for Various c-axis Correlated Pinning Centers

摘要

In order to understand the flux pinning mechanism with the different variety of the c-axis-correlated disorder, the angular dependence of critical current density Jc was measured in detail for an Y123 film with BaZrOs nano-rods, a Sm123 film fabricated by the low temperature growth (LTG) technique and an Y123 film introduced the columnar defects by the heavy ion irradiation parallel to the c-axis. We found that the flux pinning state is similar in low fields below the matching field, but it shows different behaviors in high fields above the matching field for the variety of the c-axis correlated pinning. It is considered that the interstitial vortices interacted with the c-axis-correlated disorders through the vortex interaction may play an important role for the appearance of the c-axis-correlated pinning behavior in a high-field region above the matching field.