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Updated: Aug 16, 2026

Scanning SQUID Study of Vortex Manipulation by Local Contact
Published on: February 1, 2017
Vortex-antivortex nucleation in magnetically nanotextured superconductors: magnetic-field-driven and thermal
1Departement Fysica, Universiteit Antwerpen (Campus Middelheim), Groenenborgerlaan 171, B-2020 Antwerp, Belgium.
Abstract:
Within the Ginzburg-Landau formalism, we predict two novel mechanisms of vortex-antivortex nucleation in a magnetically nanostructured superconductor. Although counterintuitive, nucleation of vortex-antivortex pairs can be activated in a superconducting (SC) film covered by arrays of submicron ferromagnets (FMs) when exposed to an external homogeneous magnetic field. In another scenario, we predict the thermal induction of vortex-antivortex configurations in SC-FM samples. This phenomenon leads to a new type of Little-Parks oscillations of the FM magnetization-temperature phase boundary of the SC film.
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