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

M. V. Milosevic·S. V. Yampolskii·F. M. Peeters
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Abstract

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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M. V. Milosevic, S. V. Yampolskii, F. M. Peeters. 2001-11-22. Multi-vortex states of a thin superconducting disk in a step-like external magnetic field. https://doi.org/10.1016/s0921-4534(01)01273-4

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