Magneto-optical investigations as a tool to improve quality of (Pb,Bi)-2223 tapes

Author

Koblischka, M.R. ; Wang, W.G. ; Seifi, B. ; Skov-Hansen, P. ; Vase, P. ; Andersen, N.H.

Author_Institution

Nordic Superconductor Technol. AS, Brondby, Denmark

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

3242

Lastpage

3245

Abstract

Flux distributions of multifilamentary (Pb,Bi)-2223 tapes are investigated by magneto-optic (MO) imaging at T=10 K and in different field orientations. This enables one to study differences between the individual filaments in a direct way. To our knowledge we have for the first time applied the field perpendicular to a cross section of an intact tape, i.e. The external field is aligned along the individual filaments. This geometry of the MO experiments enables the study of the superconducting properties of the filaments as a function of position in the tape. The flux patterns reveal the shielding properties (=critical current density) of the filaments; and the studies clearly show differences in the superconducting properties between the different filaments. Our observations provide, therefore, important information for further development of the (Pb,Bi)-2223 tapes

Keywords

bismuth compounds; calcium compounds; critical current density (superconductivity); flux-line lattice; high-temperature superconductors; lead compounds; magneto-optical effects; multifilamentary superconductors; strontium compounds; superconducting tapes; (BiPb)₂Sr₂Ca₂Cu₃O ₁₀; (Pb,Bi)-2223 tapes; 10 K; critical current density; filaments; flux distributions; flux patterns; magneto-optic imaging; magneto-optical investigations; multifilamentary (Pb,Bi)-2223 tapes; quality; shielding properties; Chemical technology; Critical current density; Geometry; Laboratories; Magnetic fields; Multifilamentary superconductors; Physics; Spatial resolution; Superconducting filaments and wires; Superconducting films;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919754

Filename

919754