Comparing powder magnetization and transport critical current of Bi,Pb(2223) tapes

Author

Dhallé, M. ; van der Laan, D.C. ; van Eck, H.J.N. ; Vargas, L. ; Ten Haken, B. ; ten Kate, H.H.J. ; Trociewitz, U.P. ; Schwartz, J.

Author_Institution

Dept. Appl. Phys., Univ. of Twente, Enschede, Netherlands

Volume

13

Issue

2

fYear

2003

fDate

6/1/2003 12:00:00 AM

Firstpage

3702

Lastpage

3705

Abstract

The magnetic field dependence of the critical current in (Bi,Pb)₂Sr₂Ca₂Cu₃O_10+x tapes is compared with the magnetization response of isolated grains extracted from the tapes. Special attention is paid to the low-field behavior. The goal of the experiment is to test the widely-used hypothesis that current paths in these tapes contain both weak- and strong- linked branches, which in low field act in parallel. The data agree with this hypothesis; at temperatures above 50 K the powder magnetization drops off exponentially from the self-field to the irreversibility field, while the transport and magnetization currents in the intact tapes show an extra low-field component. Below 50 K the powder behavior becomes less straightforward, but the parallel-path picture in the tapes still holds.

Keywords

bismuth compounds; calcium compounds; critical current density (superconductivity); high-temperature superconductors; lead compounds; magnetisation; strontium compounds; superconducting tapes; (Bi,Pb)₂Sr₂Ca₂Cu₃O_10+x; (BiPb)₂Sr₂Ca₂Cu₃O_10+x; 50 K; Bi,Pb(2223) tapes; high temperature superconductor; irreversibility field; isolated grains; low-field behavior; magnetic field dependence; magnetization response; parallel-path picture; powder magnetization; transport critical current; Bismuth; Critical current; Grain boundaries; Laboratories; Magnetic field measurement; Magnetic fields; Magnetic flux; Magnetization; Powders; Strontium;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2003.812520

Filename

1212432