MULTIFILAMENTARY SUPERCONDUCTORS WITH MAGNETIC SCREENING LAYERS

摘要

Transport ac losses in multifilamentary superconductors are reduced by magnetic de-coupling of the filaments using magnetic screening. Any increase of the losses in the superconducting filaments caused by the presence of the magnetic material and the losses in the magnetic material itself, and any reduction of the transport current, are minor in comparison with reduction of ac losses. This reduction is more pronounced if the number of filaments is high. Individual filaments (B) comprising BSCCO, YBCO or the like are covered with a thin layer (A) of Fe or NiFe.