Berlin 2012 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 52: Poster II - Magnetic Heusler compounds, Magnetic shape memory alloys, Thin Films, Micro-/Nano-structured magnetic materials, Graphene, Spins in organics, Magnetic imaging, Surface Magnetism, Spin excitations/Torque, Spincaloric transport

MA 52.55: Poster

Freitag, 30. März 2012, 11:00–14:00, Poster A

Influence of pure diffusive spin currents on magnetic switching in non-local spin valves — •Björn Burkhardt¹, Helmut Körner^2,3, Piotr Laczkowski⁴, Laurent Vila⁴, and Mathias Kläui^1,2,3 — ¹Institut für Physik, Johannes Gutenberg Universität Mainz, 50099 Mainz, Germany — ²Fachbereich Physik, Universität Konstanz, 78457 Konstanz, Germany — ³SwissFEL, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland — ⁴Laboratoire Nanostructure et Magnetisme, CEA/INAC, 38054 Grenoble, France

We analyzed magnetic switching processes in Permalloy stripes during injection of pure diffusive spin currents. These spin currents are created via a non-local spin valve design with aluminium as the non-magnetic spin conduit between the stripes. By measuring the non-local spin signals as a function of temperature we find a non-montonous behavior. To determine the spin diffusion length in the aluminium conduit the distance between injection and detection stripe was varied. The depinning of domain walls assisted by pulsed pure spin currents is further studied and the spin-torque and the Joule heating effect are separated, by using the underlying symmetries of the effect.