Little-Parks Oscillations in Hybrid Ferromagnet-Superconductor Systems

Abstract

On the basis of of linearized Usadel equations we consider superconductivity nucleation in multiply connected mesoscopic superconductor/ferromagnet hybrids such as thin-walled superconducting cylinders placed in electrical contact with a ferromagnetic metal. We study the interplay between the oscillations of $T_c$ due to the Little--Parks effect and the oscillations due to the exchange field. We demonstrate that the exchange field provokes the switching between the superconducting states with different vorticities and this may result in the increase the critical temperature of the superconducting transition in the magnetic field. Moreover we analyse the influence of the S/F transparency on the realisation of the states with higher vorticities.

7 pages, 4 figures

References in corpus (5)

• Proximity effects in superconductor-ferromagnet heterostructures
• 0-pi Josephson tunnel junctions with ferromagnetic barrier
• Spontaneous supercurrent induced by ferromagnetic pi-junctions
• Imaging spontaneous currents in superconducting arrays of pi-junctions
• Vortex States Induced by Proximity Effect in Hybrid Ferromagnet-Superconductor Systems

Cited by in corpus (8)

• Large Magnetoresistance Oscillations in Mesoscopic Superconductors Due to Current-Excited Moving Vortices
• Vanishing Meissner effect as a hallmark of in-plane FFLO instability in superconductor - ferromagnet layered systems
• Asymmetric Little-Parks Oscillations in Full Shell Double Nanowires
• Temperature controlled FFLO instability in superconductor-ferromagnet hybrids
• FFLO states and quantum oscillations in mesoscopic superconductors and superfluid ultracold Fermi gases
• Long-range triplet proximity effect in multiply connected ferromagnet-superconductor hybrids
• Inverse proximity effect in semiconductor Majorana nanowires
• Josephson current and $\pi -$state in ferromagnet with embedded superconducting nanoparticles