DocumentCode
26887
Title
Trapped Field and Flux Creep in Stacked (Gd,Y) 
Superconductor Tape Arrays
Author
Selva, Kavita ; Xiao-Fen Li ; Majkic, Goran
Author_Institution
Clear Lake High Sch., Houston, TX, USA
Volume
25
Issue
3
fYear
2015
fDate
Jun-15
Firstpage
1
Lastpage
5
Abstract
The effect of in-field critical current and number of tapes in crisscross-arranged stacks of zirconium-doped (Gd,Y)Ba2Cu3Ox superconductor tape arrays on the magnitude and decay of trapped magnetic field at 77 K has been investigated over an area of 36 × 36 mm. The trapped field was found to vary with zirconium content, increasing from 0% to 7.5% Zr addition and decreasing from 7.5% to 15% Zr addition, consistent with the magnitude of critical current of the tapes at 1 T and 77 K. The trapped field in the stacked superconductor tape arrays was observed to increase linearly with the number of layers of tapes in the stack, even up to 236 layers. A logarithmic time-dependent decay of trapped magnetic field was observed in all stacks, consistent with the phenomenon of thermally-activated flux creep. The rate of decay of trapped field was found to decrease with increasing number of tapes in the stacked superconductor tape arrays.
Keywords
barium compounds; critical currents; flux creep; gadolinium compounds; high-temperature superconductors; superconducting tapes; yttrium compounds; zirconium; (GdY)Ba2Cu3Ox:Zr; Zr addition; crisscross-arranged stacks; critical current magnitude; in-field critical current effect; logarithmic time-dependent decay; stacked superconductor tape arrays; temperature 77 K; thermally-activated flux creep phenomenon; trapped field decay rate; trapped magnetic field magnitude; zirconium content; zirconium-doped superconductor tape arrays; Critical current density (superconductivity); Magnetic field measurement; Magnetic fields; Superconducting epitaxial layers; Superconducting films; Superconducting magnets; Zirconium; Coated conductors; coated conductors; flux creep; superconductor tapes; thin film; trapped field magnets;
fLanguage
English
Journal_Title
Applied Superconductivity, IEEE Transactions on
Publisher
ieee
ISSN
1051-8223
Type
jour
DOI
10.1109/TASC.2014.2367159
Filename
6945881
Link To Document