Ring-shaped vortex domain in type-II superconductors.
We present results of experiments in superconducting niobium and numerical simulations showing the creation of a metastable ring-shaped vortex domain by heating. Such vortex rings, if pinned by structural defects, can exist forever.
Gröger
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A
Grenoble High Magnetic Field Laboratory, Max-Planck-Insitut für Festkörperforschung and Centre National de la Recherche Scientifique, 25 rue des Martyrs, F-38042 Grenoble Cedex 9, France.
Böhm
A
A
Beyer
U
U
Shapiro
B Ya
BY
Shapiro
I
I
Wyder
P
P