DocumentCode :
1529448
Title :
Critical current properties of screen-printed Ag-Bi2223 tapes
Author :
Oota, A. ; Tanaka, M. ; Fujikawa, Kenji
Author_Institution :
Toyohashi Univ. of Technol., Japan
Volume :
7
Issue :
2
fYear :
1997
fDate :
6/1/1997 12:00:00 AM
Firstpage :
2106
Lastpage :
2109
Abstract :
Critical current densities J/sub c/ (T,B,/spl theta/) were investigated on screen-printed, c-axis-oriented Ag-Bi2223 mono-layer tape, at temperatures between 55 and 77 K in fields up to 8T as a function of field angle /spl theta/ between B and c axis. At temperatures T/spl les/30 K, a shift of a peak angle from /spl theta/=90/spl deg/ (i.e., B/spl perp/c axis) occurs in the J/sub c/ vs. /spl theta/ curve accompanied by an additional asymmetry. Such anomalies are explained by the history effect in the field dependence of J/sub c/ for B/spl par/c axis ascribed to the grain-boundary weak links, on the assumption that J/sub c/ is dominated by the field component B/spl par/=Bcos/spl theta/ parallel to the c axis. At elevated temperatures, disappearance of the history effect results in a perfectly symmetrical angular dependence of J/sub c/ with a peak at /spl theta/=90/spl deg/. An increase in the number of ceramic layers for the screen-printed tape does not cause significant influence on critical current properties.
Keywords :
bismuth compounds; calcium compounds; composite superconductors; critical current density (superconductivity); high-temperature superconductors; lead compounds; silver; strontium compounds; superconducting tapes; 0 to 8 T; 4.5 to 77 K; BiPbSrCaCuO-Ag; HTSC; c-axis-oriented Ag-Bi2223 mono-layer tape; ceramic layers; critical current densities; critical current properties; elevated temperatures; field component; field dependence; grain-boundary weak links; history effect; perfectly symmetrical angular dependence; screen-printed Ag-Bi2223 tapes; Anisotropic magnetoresistance; Ceramics; Creep; Critical current; Critical current density; History; Magnetic field measurement; Superconducting magnets; Superconducting transition temperature; Temperature dependence;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/77.621007
Filename :
621007
Link To Document :
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