Mesoscopic field and current compensator based on a hybrid superconductor-ferromagnet structure

Abstract

A rather general enhancement of superconductivity is demonstrated in a hybrid structure consisting of submicron superconducting (SC) sample combined with an in-plane ferromagnet (FM). The superconducting state resists much higher applied magnetic fields for both perpendicular polarities, as applied field is screened by the FM. In addition, FM induces (in the perpendicular direction to its moment) two opposite current-flows in the SC plane, under and aside the magnet, respectively. Due to the compensation effects, superconductivity persists up to higher applied currents. With increasing current, the sample undergoes SC-"resistive"-normal state transitions through a mixture of vortex-antivortex and phase-slip phenomena.

4 pages, 5 figures, to appear in Phys. Rev. Lett

References in corpus (3)

• Ferromagnet-Superconductor Hybrids
• Vortex-antivortex nucleation in magnetically nanotextured superconductors: Magnetic-field-driven and thermal scenarios
• Influence of the stray field of magnetic dot on the nucleation of superconductivity in a disk

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• Symmetric and non-symmetric vortex-antivortex molecules in fourfold superconducting geometry
• Thermodynamics and Phase Diagrams of layered superconductor/ferromagnet nanostructures
• Field-free superconducting diode in a magnetically nanostructured superconductor
• Planar superconductor/ferromagnet hybrids: Anisotropy of resistivity induced by magnetic templates
• Chiral Symmetry breaking in Three Dimensional QED
• Vortex manipulation in a superconducting matrix with view on applications
• First order phase transitions in Ferromagnet/Superconductor layered structures
• Crossover between different regimes of inhomogeneous superconductivity in planar superconductor-ferromagnet hybrids
• Spin-wave confinement in a hybrid superconductor-ferrimagnet nanostructure
• Anisotropy and effective dimensionality crossover of the fluctuation conductivity of hybrid superconductor/ferromagnet structures