Superconducting articles and methods of fabrication thereof with reduced AC magnetic field losses
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United States of America Patent
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Sep 4, 2012
Grant Date -
Jul 15, 2010
app pub date -
Jan 9, 2009
filing date -
Jan 9, 2009
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Abstract
A superconducting article is provided which includes a superconducting tape assembly. The superconducting tape assembly includes a superconducting tape layer, having one or more superconducting tapes, and a high-permeability magnetic material layer coupled to the superconducting tape layer. The high-permeability magnetic material layer includes a high-permeability magnetic material which remains magnetically soft at a critical temperature Tc of the superconducting tape, and with presence of an ac magnetic field acting on the superconducting tape assembly, re-magnetizes to divert at least a portion of a normal component of the ac magnetic field therethrough, which reduces ac loss in the superconducting tape layer by modifying the ac magnetic field distribution within the superconducting tape of the superconducting tape layer.
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