Dresden 2011 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 63: Poster II (Surface Magnetism/ Magnetic Imaging/ Topological Insulators/ Spin Structures and Magnetic Phase Transitions/ Graphene/ Magnetic Thin Films/ Magnetic Semiconductors/ Magnetic Half-metals and Oxides/ Spin-dependent Transport/ Spin Excitations and Spin Torque/ Spin Injection and Spin Currents in Heterostructures/ Spintronics/ Magnetic Storage and Applications)
MA 63.81: Poster
Freitag, 18. März 2011, 11:00–14:00, P2
Highly efficient spin-current assisted domain wall depinning — •Helmut Körner1,2, Emil Tafra2, Jakoba Heidler2, Jan Rhensius2,3, Laura Heyderman3, and Mathias Kläui2 — 1Universität Konstanz, 78457 Konstanz, Germany — 2SwissFEL, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland & Laboratory for Nanomagnetism and Spin Dynamics, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland — 3Laboratory for Micro- and Nanotechnology, Paul Scherrer Institut, 5323 Villingen, Switzerland
We have recently shown, that the depinning of domain walls can be very efficiently assisted by pure diffusive spin currents in a non-local spin valve consisting of a Permalloy wire and a Permalloy halfring with Copper as a non-magnetic spin conduit. We have now further improved the sample design by replacing the ferromagnetic wire used for spin injection by an additional halfring to study the effect of different spin directions for the injected spin current. Spin diffusion length and spin polarization are deduced from the measurements and for the chosen geometry simulations of the angular dependence of the spin torque are determined.
[1] D. Ilgaz et al., Phys. Rev. Lett. 105, 076601 (2010)