Abstract
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 language | English |
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Pages (from-to) | 3702-3705 |
Number of pages | 4 |
Journal | IEEE transactions on applied superconductivity |
Volume | 13 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2003 |
Keywords
- 22/4 OA procedure