Patent ID: 8260387

Claim:
A superconducting article comprising: a superconducting tape assembly, the superconducting tape assembly comprising: a superconducting tape layer comprising at least one superconducting tape; and a high permeability magnetic material layer coupled to the superconducting tape layer, the high permeability magnetic material layer being disposed parallel to and covering a main surface of the superconducting tape layer, and wherein the high-permeability magnetic material layer comprises a high-permeability magnetic material which remains magnetically soft at a critical temperature T c of the at least one 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, thereby reducing ac loss in the superconducting tape layer by modifying ac magnetic field distribution within the at least one superconducting tape.