Scan Techniques for Coated Conductors

We report on Hall scan and magnetoscan measurements on coated conductors. The magnetoscan technique was optimized for scanning tapes of high temperature superconductors, in order to analyze their homogeneity and current carrying capability. The principle of the magnetoscan technique consists of magnetizing the sample locally by moving a magnet over the sample surface and measuring the magnetic field of the induced supercurrents with a Hall probe. The position of the Hall probe, the permanent magnet as well as the gap between permanent magnet and sample can be changed in our setup. The measurements were done on different conductors with different architecture. The map of the magnetic field above the surface of the sample reflects dasiastrongpsila and dasiaweakpsila superconducting areas in the tape allowing to analyze the defect structure and the critical currents. The results show good agreement with conventional measurements.