Regensburg 2016 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 19: Superconductivity: Poster Session

TT 19.30: Poster

Montag, 7. März 2016, 15:00–18:00, Poster D

Microwave spectroscopy and electronic transport properties of ferromagnetic Josephson junctions and superconducting spin-valves — Marcel Thalmann, Marcel Rudolf, and •Torsten Pietsch — Zukunftskolleg & Department of Physics, University of Konstanz, Universitätsstraße 10, 78464 Konstanz, Germany

Hybrid superconducting nanostructures recently attracted tremendous interest, due to their great potential in dissipation-less spin-electronics with unprecedented switching rates. The practical realisation of such devices, however, requires a complete understanding of the transfer and dynamics of spin- and charge currents between superconducting (S) and ferromagnetic (F) circuit elements, as well as the coupling between spin- and charge degrees of freedom in these systems. We investigate novel transport phenomena in superconductor-ferromagnet hybrid nanostructures under non-equilibrium conditions. Microwave spectroscopy is used to elucidate fundamental questions related to the complex interplay of competing order parameters and the question of relaxation mechanisms of non-equilibrium distributions with respect to spin, charge and energy. Recent experiments on two complimentary device structures are discussed: I) in diffusive S/F/S Josephson junctions with non-sinusoidal current-phase relationship and II) local and non-local transport measurements and microwave spectroscopy in F/S/F lateral spin-valves.