Multi-vortex states of a thin superconducting disk in a step-like external magnetic field

Details Multi-vortex states of a thin superconducting disk in a step-like external magnetic field Multi-vortex states of a thin superconducting disk in a step-like external magnetic field

2001-11-22

arxiv.org/abs/cond-mat/0111435v1

Physica C 369, 343 (2002)

Physics

Condensed Matter

Superconductivity

5 pages, 5 figures, (contribution to the Second European Conference in School Format on Vortex Matter in Superconductors, Cret

Scientific paper

10.1016/S0921-4534(01)01273-4

The vortex states in a thin mesoscopic disk are investigated within the phenomenological Ginzburg-Landau theory in the presence of a step-like external magnetic field with zero average which could model the field resulting from a ferromagnetic disk or a current carrying loop. The regions of existence of the multi-vortex state and the giant vortex state are found. We analyzed the phase transitions between them and found regions in which ring-shaped vortices contribute. Furthermore, we found a vortex state consisting of a central giant vortex surrounded by a collection of anti-vortices that are located in a ring around this giant vortex.

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