Journal
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
Volume 14, Issue 9, Pages 672-675Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0953-2048/14/9/307
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YBCO-coated conductors were modelled in a computer simulation using a resistor network concept, with the resistors representing the grain boundaries. Dissipation above the critical current, accompanied by flux penetration into the grain boundaries, was described by a linear (flux-flow) resistivity. The model allowed calculation of the combined percolation of current and magnetic flux. Current-voltage data showed scaling in agreement with percolation theory for two-dimensional systems. The influence of grain alignment and electromagnetic parameters on conductor performance was investigated.
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