Multi-vortex states of a thin superconducting disk in a step-like external magnetic field
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.
Cite
@article{arxiv.cond-mat/0111435,
title = {Multi-vortex states of a thin superconducting disk in a step-like external magnetic field},
author = {M. V. Milosevic and S. V. Yampolskii and F. M. Peeters},
journal= {arXiv preprint arXiv:cond-mat/0111435},
year = {2009}
}
Comments
5 pages, 5 figures, (contribution to the Second European Conference in School Format on Vortex Matter in Superconductors, Crete, Greece, September 15-25, 2001; to be published in Physica C)