Current distribution and flow in magnetic fields for Ag-sheathed Bi2223 monocore tapes

Citation
K. Kawano et al., Current distribution and flow in magnetic fields for Ag-sheathed Bi2223 monocore tapes, IEEE APPL S, 11(1), 2001, pp. 3651-3654
Citations number
10
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
ISSN journal
10518223 → ACNP
Volume
11
Issue
1
Year of publication
2001
Part
3
Pages
3651 - 3654
Database
ISI
SICI code
1051-8223(200103)11:1<3651:CDAFIM>2.0.ZU;2-3
Abstract
Using a micro Hall-sensor, magnetic-field distributions are measured at 77 K on a surface of zero-field-cooled samples of Bi2223 monocore tapes, in ma gnetic fields B, up to 800mT perpendicular to a tape surface. The one-dimen sional magnetic profile along a width direction of a sample shows a marked concave due to shielding currents, which shape changes as B, increases. In low fields up to 10mT, there is a sharp peak positioning at the tape center in the profile, while it disappears and converts to a broad concave with a n increase of B, From numerical calculations on magnetic fields, such a cha nge in the profile is related to a change in current flow with B, An increa se in B, limits and narrows the region of current now in the Ag-sheathed Bi 2223 tapes, from the whole part of superconductor to the Ag/Bi2223 interfac e.