Abstract

In this paper we mainly focus on the effect of a ferromagnetic material on the critical current of Bi-2223 tape. The magnetic field distributions of tapes with several different layouts of a ferromagnetic material are investigated by calculation and the corresponding critical current is tested experimentally. The analysis indicates that the critical current of the tape can be improved effectively by laying the ferromagnetic material perpendicularly next to the tape edge. Furthermore, various other ferromagnetic parameters are also important for reducing the magnetic field induced by the current flowing through the tape.

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