Josephson current in a superconductor -- ferromagnet -- superconductor junction with in-plane ferromagnetic domains

Abstract

We study a diffusive superconductor--ferromagnet--superconductor (SFS) junction with in-plane ferromagnetic domains. Close to the superconducting transition temperature, we describe the proximity effect in the junction with the linearized Usadel equations. We find that properties of such a junction depend on the size of the domains relative to the magnetic coherence length. In the case of large domains, the junction exhibits transitions to the $\pi$ state, similarly to a single-domain SFS junction. In the case of small domains, the magnetization effectively averages out, and the junction is always in the zero state, similarly to a superconductor--normal metal--superconductor (SNS) junction. In both those regimes, the influence of domain walls may be approximately described as an effective spin-flip scattering. We also study the inhomogeneous distribution of the local current density in the junction. Close to the 0--$\pi$ transitions, the directions of the critical current may be opposite in the vicinity of the domain wall and in the middle of the domains.

9 pages, 6 figures

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Cited by in corpus (20)

• Singlet-triplet conversion and the long-range proximity effect in superconductor-ferromagnet structures with generic spin dependent fields
• Theory of superconducting and magnetic proximity effect in S$\mid$F structures with inhomogeneous magnetization textures and spin-active interfaces
• 0-pi Transitions in a Superconductor/Chiral Ferromagnet/Superconductor Junction induced by a Homogeneous Cycloidal Spiral
• Josephson current in diffusive multilayer superconductor/ferromagnet/superconductor junctions
• Proximity Induced Vortices and Long-Range Triplet Supercurrents in Ferromagnetic Josephson Junctions and Spin Valves
• Generation of pure superconducting spin current in magnetic heterostructures via non-locally induced magnetism due to Landau Fermi-liquid effects
• Spin Controlled Coexistence of 0 and π States in SFSFS Josephson Junctions
• Josephson $\phi$-junctions based on structures with complex normal/ferromagnet bilayer
• Spin supercurrent in Josephson contacts with noncollinear ferromagnets
• Van der Waals pi Josephson junctions
• Effective spin-flip scattering in diffusive superconducting proximity systems with magnetic disorder
• Spin-flip scattering and non-ideal interfaces in dirty ferromagnet/superconductor junctions
• Transverse Josephson diode effect in tilted Dirac systems
• Josephson effect in SIFS-tunnel junctions with domain walls in weak link region
• Cascading Proximity Effects in Rotating Magnetizations
• Spin current injection via equal-spin Cooper pairs in ferromagnet/superconductor heterostructures
• Magnetic interference patterns in long disordered Josephson junctions
• Long-Range Triplet Supercurrents Induced by Singlet Supercurrents Parallel to Magnetic Interfaces
• Proximity Effect in Superconducting Heterostructures with Strong Spin-Orbit Coupling and Spin Splitting
• Minigap suppression in S(N/F)S junctions