Reduction of ac transport and magnetization loss of a high-Tc superconducting tape by placing soft ferromagnetic materials at the edges

Abstract

Reduction of dissipation at the transport of alternating current as well as when exposed to a time varying magnetic field has been observed in the tape from high-temperature superconductor Bi2Sr2Ca2Cu3O10 covered by a Ni sheath at the edges. The improvement of critical current can explain this achievement only in part. Analysis of experimental data shows that also a more favorable pattern of the magnetic flux penetration should take place.