The magneto-optical imaging technique is applied to
YBa2Cu3O7−δ
(YBCO) thin film coated conductors, providing a visual investigation of sub-millimetre
aberrations and fracture defects. The further application of post-processing techniques
provides a quantitative analysis of varying patterns resulting from field penetration in the
YBCO coated conductor investigations. Application of theory provides critical current
information for geometries where the conduction path is perpendicular to the applied field
in micro-bridge samples. A Maxwell curl calculation is performed on the intensity
distribution of various images. These calculations reveal boundaries for current paths via
relative screening current determination and striations.
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