Benefits of current percolation in superconducting coated conductors
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Authors
Abstract
The critical currents of MOD/RABiTS and PLD/IBAD coated conductors have been measured as a function of magnetic field orientation and compared to films grown on single crystal substrates. By varying the orientation of magnetic field applied in the plane of the film, we are able to determine the extent to which current flow in each type of conductor is percolative. Standard MOD/RABiTS conductors have also been compared to samples whose grain boundaries have been doped by diffusing Ca from an overlayer. We find that undoped MOD/RABiTS tapes have a less anisotropic in-plane field dependence than PLD/IBAD tapes and that the uniformity of critical current as a function of in-plane field angle is greater for MOD/RABiTS samples doped with Ca.
Description
Keywords
cond-mat.supr-con, cond-mat.supr-con
Journal Title
Applied Physics Letters
Conference Name
Journal ISSN
0003-6951
1077-3118
1077-3118
Volume Title
87
Publisher
American Institute of Physics
Publisher DOI
Sponsorship
EPSRC
US Department of Energy