Superconducting Wigner Vortex Molecule near a Magnetic Disk

Abstract

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.

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

References in corpus (1)

• Nanoengineered magnetic-field-induced superconductivity

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