Double proximity effect in hybrid planar Superconductor-(Normal metal/Ferromagnet)-Superconductor structures

Abstract

We have investigated the differential resistance of hybrid planar Al-(Cu/Fe)-Al submicron bridges at low temperatures and in weak magnetic fields. The structure consists of Cu/Fe-bilayer forming a bridge between two superconducting Al-electrodes. In superconducting state of Al-electrodes, we have observed a double-peak peculiarity in differential resistance of the S-(N/F)-S structures at a bias voltage corresponding to the minigap. We claim that this effect (the doubling of the minigap) is due to an electron spin polarization in the normal metal which is induced by the ferromagnet. We have demonstrated that the double-peak peculiarity is converted to a single peak at a coercive applied field corresponding to zero magnetization of the Fe-layer.

References in corpus (3)

• Evidence for crossed Andreev reflection in superconductor-ferromagnet hybrid structures
• Phase controlled superconducting proximity effect probed by tunneling spectroscopy
• Tunnel Spectroscopy of a Proximity Josephson Junction

Cited by in corpus (19)

• Spin-polarized supercurrents for spintronics: a review of current progress
• Magnetic Josephson Junctions with Superconducting Interlayer for Cryogenic Memory
• Axion field and the quark nugget's formation at the QCD phase transition
• A cryogenic memory element based on an anomalous Josephson junction
• Theory of supercurrent transport in SIsFS Josephson junctions
• Planar Superconductor-Ferromagnet-Superconductor Josephson junctions as scanning probe sensors
• Axion mass estimates from resonant Josephson junctions
• Josephson junction-based axion detection through resonant activation
• Ferromagnetic planar Josephson junction with transparent interfaces: a ϕ junction proposal
• Odd triplet superconductivity induced by the moving condensate
• Controllable supercurrent in mesoscopic superconductor-normal metal-ferromagnet crosslike Josephson structures
• Theory of a Weak-Link Superconductor-Ferromagnet Josephson Structure
• The physics of superconductor-ferromagnet hybrid structures
• Axion field influence on Josephson junction quasipotential
• Reconstruction of the DOS at the end of a S/F bilayer
• Density of states and current-voltage characteristics in SIsFS junctions
• Inverse proximity effect in thin-film superconductor/magnet heterostructures with metallic and insulating magnets
• 0-$\pi$ transition driven by magnetic proximity effect in a Josephson junction
• Minigap suppression in S(N/F)S junctions