Magneto-optical investigations of Ag-sheathed Bi-2223 tapes with ferromagnetic shielding

An increase in the critical current and suppression of AC losses in superconducting wires and tapes with soft magnetic sheath have been predicted theoretically and confirmed experimentally. In this work we present the results of magneto-optical investigations on a series of Ag-sheathed Bi-2223 tapes...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2007-09, Vol.460 (2), p.803-804
Main Authors: Yurchenko, V.V., Shantsev, D.V., Galperin, Y.M., Alamgir, A.K.M., Han, Z., Johansen, T.H.
Format: Article
Language:English
Subjects:
Applied sciences
Bi-2223
Electrical engineering. Electrical power engineering
Exact sciences and technology
Ferromagnetic shielding
Magneto-optical imaging
Materials
Tapes
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Summary:An increase in the critical current and suppression of AC losses in superconducting wires and tapes with soft magnetic sheath have been predicted theoretically and confirmed experimentally. In this work we present the results of magneto-optical investigations on a series of Ag-sheathed Bi-2223 tapes with Ni coating. We visualize distributions of magnetic field at increasing external field and different temperatures, demonstrating a difference between the flux propagation in the superconductor with Ni rims and a reference sample without Ni coating.
ISSN:0921-4534
1873-2143
DOI:10.1016/j.physc.2007.04.122