Self field of ac current reveals voltage-current law in type-II superconductors

Details Self field of ac current reveals voltage-current law in type-II superconductors Self field of ac current reveals voltage-current law in type-II superconductors

2006-08-03

arxiv.org/abs/cond-mat/0608093v2

Physics

Condensed Matter

Superconductivity

14 pages, 9 figures

Scientific paper

10.1103/PhysRevB.74.094506

The distribution of ac magnetic fields in a thin superconducting strip is calculated when an ac current is applied to the sample. The edge barrier of the strip to flux penetration and exit is taken into account. The obtained formulas provide a basis to extract voltage-current characteristics in the bulk and at the edges of superconductors from the measured ac magnetic fields. Based on these results, we explain the spatial and temperature dependences of the profiles of the ac magnetic field measured in a Bi2Sr2CaCu2O8 strip [D.T. Fuchs et al., Nature 91, 373 (1998)].

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