Superconducting Wigner Vortex Molecule near a Magnetic Disk

Details Superconducting Wigner Vortex Molecule near a Magnetic Disk Superconducting Wigner Vortex Molecule near a Magnetic Disk

2002-11-25

arxiv.org/abs/cond-mat/0211547v1

Phys. Rev. B 68, 024509 (2003)

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures. Submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevB.68.024509

Within the non-linear Ginzburg-Landau (GL) theory, we investigate the vortex structure in a superconducting thin film with a ferromagnetic disk on top of it. Antivortices are stabilized in shells around a central core of vortices (or a giant-vortex) with size-magnetization controlled ``magic numbers''. An equilibrium vortex phase diagram is constructed. The transition between the different vortex phases occurs through the creation of a vortex-antivortex pair under the magnetic disk edge.

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