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Magnetic Fields of Vortices in a Superconducting Thin Film
Kossler, W. J. Abraham, Nathan Stronach, C. E. Greer, Allan J.
Kossler, W. J.
Abraham, Nathan
Stronach, C. E.
Greer, Allan J.
Abstract
The magnetic fields associated with a single superconducting vortex traversing a thin film are calculated. The formulation of Pearl, which has been used for a geometry in which for z0 one has superconducting material, is extended to the case of a thin film. For the thin film, the flux in the mid-plane is less than a flux quantum unless one uses a very large radius. For instance a 100 nm film with a 130 nm penetration depth (lambda) has only 80% of a flux quantum within a radius of 1.5 mu m = 11.5.lambda. At 10 mu m 96% is enclosed. The magnetic field near the surface in both geometries has a significant radial component. The fields for a vortex array are then obtained by summing the fields from nearby vortices. The measurability of the field distributions is discussed.
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2012-01-01
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Physics
DOI
https://doi.org/10.1016/j.phpro.2012.04.082