Vortex States Induced by Proximity Effect in Hybrid Ferromagnet-Superconductor Systems

Abstract

We consider superconductivity nucleation in multiply connected mesoscopic samples such as thin-walled cylinders or rings placed in electrical contact with a ferromagnet. The superconducting critical temperature and order parameter structure are studied on the basis of linearized Usadel equations. We suggest a mechanism of switching between the superconducting states with different vorticities caused by the exchange field and associated with the oscillatory behavior of the Cooper pair wave function in a ferromagnet.

7 pages, 6 figures

References in corpus (2)

• Proximity effects in superconductor-ferromagnet heterostructures
• 0-pi Josephson tunnel junctions with ferromagnetic barrier

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• FFLO states and quantum oscillations in mesoscopic superconductors and superfluid ultracold Fermi gases
• Rotating Fulde-Ferrell-Larkin-Ovchinnikov state in cold Fermi gases
• Long-range triplet proximity effect in multiply connected ferromagnet-superconductor hybrids
• Josephson current and $\pi -$state in ferromagnet with embedded superconducting nanoparticles