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R. Fuger, F. Hengstberger, M. Eisterer, H. W. Weber:
"Scan Techniques for Coated Conductors";
IEEE Transactions on Applied Superconductivity, 17 (2007), 2; 3753 - 3756.

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 `strong´ and
`weak´ superconducting areas in the tape allowing to analyze the
defect structure and the critical currents. The results show good
agreement with conventional measurements.