Spin transport and magnetoresistance in F/S/F spin valves

Abstract

We consider spin transport and spin relaxation in superconductors using the quasiclassical theory of superconductivity. We include spin relaxation due to spin-orbit interaction as well as magnetic impurities, and show that the energy dependence of the spin-flip rate is different for these two mechanisms. In ferromagnet-superconductor-ferromagnet systems made of Co and Al, interface resistances can be small compared to bulk resistances. This simplifies the description of transport in Co/Al/Co spin valves, for which we numerically calculate the temperature and Al length dependence of the magnetoresistance.

arXiv comment6 pages, 6 figures

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• Thermal, electric and spin transport in superconductor/ferromagnetic-insulator structures
• Spin injection and relaxation in a mesoscopic superconductor
• Circuit theory of crossed Andreev reflection
• Microscopic theory of spin transport at the interface between the superconductor and a ferromagnetic insulator
• Supercurrent-Induced Magnetization Dynamics
• Spin injection from a normal metal into a mesoscopic superconductor
• Photon-assisted electron transmission resonance through a quantum well with spin-orbit coupling
• Proximity effect-assisted absorption of spin currents in superconductors
• Superconducting Proximity Effect through a Magnetic Domain Wall
• Long-range spin imbalance in mesoscopic superconductors under a Zeeman splitting
• Non-equilibrium spin transport in Zeeman-split superconductors
• Injection of nonequilibrium quasiparticles into Zeeman-split superconductors: a way to create long-range spin imbalance
• Conservation of spin supercurrents in superconductors
• Effects of spin orbit coupling in superconducting proximity devices -- application to $\mathrm{CoS}{\mathrm{i}}_2/TiS{\mathrm{i}}_2$ heterostructures
• Stimulated quasiparticles in spin-split superconductors
• Spin Hanle effect in mesoscopic superconductors
• Triplet supercurrent in ferromagnetic Josephson junctions by spin injection
• Spin-flip Enhanced Thermoelectricity in Superconductor-Ferromagnet Bilayers
• Spin diffusion equation in superconductors in the vicinity of Tc
• A novel superconducting-velocity--tunable quasiparticle state and spin relaxation in GaAs (100) quantum wells in proximity to $s$-wave superconductor
• Microwave-assisted thermoelectricity in SIS' tunnel junctions
• Spin Injection and Detection in a Mesoscopic Superconductor at Low Temperatures
• AC Josephson Effect Induced by Spin Injection
• Spin injection and spin relaxation in odd-frequency superconductors
• Proximity-driven source of highly spin-polarized ac current on the basis of superconductor/weak ferromagnet/superconductor voltage-biased Josephson junction