Physics – Condensed Matter – Superconductivity
Scientific paper
2001-08-02
Supercond. Sci. Technol. 15, 82-89 (2002)
Physics
Condensed Matter
Superconductivity
RevTeX, 9 pages, 9 figures, submitted to Supercond. Sci. Technol. Revision: MO image and more refs are added
Scientific paper
10.1088/0953-2048/15/1/314
The dynamics of magnetic flux distributions across a YBaCuO strip carrying transport current is measured using magneto-optical imaging at 20 K. The current is applied in pulses of 40-5000 ms duration and magnitude close to the critical one, 5.5 A. During the pulse some extra flux usually penetrates the strip, so the local field increases in magnitude. When the strip is initially penetrated by flux, the local field either increases or decreases depending both on the spatial coordinate and the current magnitude. Meanwhile, the current density always tends to redistribute more uniformly. Despite the relaxation, all distributions remain qualitatively similar to the Bean model predictions.
Baziljevich Michael
Bobyl A. V.
Galperin Yu. M.
Johansen Tom H.
Karmanenko S. F.
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