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

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

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The magnetic field dependence of the critical current in (Bi,Pb)/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub 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.
Original languageEnglish
Pages (from-to)3702-3705
Number of pages4
JournalIEEE transactions on applied superconductivity
Issue number2
Publication statusPublished - 2003


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