Spin supercurrent in Josephson contacts with noncollinear ferromagnets

Abstract

We present a theoretical study of the Josephson coupling of two s-wave superconductors which are connected through a diffusive contact consisting of noncollinear ferromagnetic domains. First, we consider a contact with two domains with magnetization vectors misoriented by an angle $\theta$. Using the quantum circuit theory, we find that in addition to the charge supercurrent, a spin supercurrent, which is even in $\varphi$ and odd in $\theta$, with a spin polarization normal to the magnetization vectors flows between the domains. Furthermore, with asymmetric insulating barriers at the interfaces of the junction, the system may experience an antiferromagnetic-ferromagnetic phase transition for $\varphi =\pi$. Secondly, we discuss the spin supercurrent in an extended magnetic texture with multiple domainwalls. We find the position-dependent spin supercurrent. The magnitude of the spin supercurrent strongly depends on the phase difference between the superconductors and the number of domain walls. Our results demonstrate the possibility to couple the superconducting phase to the magnetization dynamics.

15 pages, 7 figures

References in corpus (17)

• Spin Transfer Torques
• A spin triplet supercurrent through the half-metallic ferromagnet CrO2
• Non-collinear Magnetoelectronics
• Spin-dependent Cooper Pair Phase and Pure Spin Supercurrents in Strongly Polarized Ferromagnets
• Superconductors as ideal spin sources for spintronics
• Spin Josephson effect in ferromagnet/ferromagnet tunnel junctions
• Interplay of ferromagnetism and triplet superconductivity in a Josephson junction
• 0-$\pi$ transition in magnetic triplet superconductor Josephson junctions
• Theory of Nonequilibrium Spin Transport and Spin Transfer Torque in Superconducting-Ferromagnetic Nanostructures
• Josephson current in a superconductor -- ferromagnet -- superconductor junction with in-plane ferromagnetic domains
• Nonsinusoidal current-phase relation in strongly ferromagnetic and moderately disordered SFS junctions
• Dynamics of spin transport in voltage-biased Josephson junctions
• Nonequilibrium spin-dependent phenomena in mesoscopic superconductor-normal metal tunnel structures
• Nonsinusoidal current-phase relations and the $0-\pi$ transition in diffusive ferromagnetic Josephson junctions
• Manipulating nonequilibrium magnetism through superconductors
• Width of the $0-\pi$ phase transition in diffusive magnetic Josephson junctions
• Spin polarized current and Andreev transmission in planar superconducting/ferromagnetic Nb/Ni junctions

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