A METHOD FOR DETERMINING CRITICAL CURRENTS FROM CURRENT-VOLTAGE CURVES OF SILVER-SHEATHED BISMUTH TAPES

Authors
REIMANN NE ZWEIACKER P
Citation
Ne. Reimann et P. Zweiacker, A METHOD FOR DETERMINING CRITICAL CURRENTS FROM CURRENT-VOLTAGE CURVES OF SILVER-SHEATHED BISMUTH TAPES, Superconductor science and technology, 7(8), 1994, pp. 592-595
Citations number
6
Categorie Soggetti
Physics, Applied","Physics, Condensed Matter
Journal title
Superconductor science and technology → ACNP
ISSN journal
09532048
Volume
7
Issue
8
Year of publication
1994
Pages
592 - 595
Database
ISI
SICI code
0953-2048(1994)7:8<592:AMFDCC>2.0.ZU;2-#
Abstract
We are at present measuring current-voltage characteristics of Ag-shea thed Bi(2223) tape samples, in DC, AC and transient phenomena conditio ns. One of our aims is the precise determination of our samples' criti cal currents. In this paper, we present a critical-current determinati on method, based on the search for an optimal fit of our curves, appro ximated by an exponential law, in DC and AC current conditions. This m ethod made it possible to avoid the arbitrary choice of a voltage thre shold that did not allow a significant comparison between the AC and D C curves. Furthermore, we were able to determine the parameters of the exponential law, which appears to agree well with our experimental re sults.