Vortex Plasma in a Superconducting Film with Magnetic Dots

Details Vortex Plasma in a Superconducting Film with Magnetic Dots Vortex Plasma in a Superconducting Film with Magnetic Dots

1999-05-03

arxiv.org/abs/cond-mat/9905025v1

Physics

Condensed Matter

Superconductivity

RevTeX, 4 pages

Scientific paper

10.1209/epl/i2000-00500-3

We consider a superconducting film, placed upon a magnetic dot array. Magnetic moments of the dots are normal to the film and randomly oriented. We determine how the concentration of the vortices in the film depends on the magnetic moment of a dot at low temperatures. The concentration of the vortices, bound to the dots, is proportional to the density of the dots and depends on the magnetization of a dot in a step-like way. The concentration of the unbound vortices oscillates about a value, proportional to the magnetic moment of the dots. The period of the oscillations is equal to the width of a step in the concentration of the bound vortices.

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