Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 91: [MA] Poster II
O 91.51: Poster
Freitag, 30. März 2012, 11:00–14:00, Poster A
Determination and characterization of spin torque in perpendicular magnetized multilayer materials — •Tomek Schulz1, Jan Heinen1,2, Mathias Kläui1,2,7, Olivier Boulle3, Gregory Malinowsky4, Christian Ulysse6, Giancarlo Faini6, Denise Hinzke2, Henk Swagten5, Bert Koopmans5, and Berthold Ocker8 — 1Institut für Physik, Johannes Gutenberg-Universität Mainz, Germany — 2Fachbereich für Physik, Universität Konstanz, Germany — 3Spintec, UMR CEA/CNRS/UJF-Grenoble 1/Grenoble-INP, France — 4Laboratoire de physique des solides, Universite Paris-sud, France — 5Department of Applied Physics, Eindhoven University of Technology, The Netherlands — 6CNRS, Phynano team, Laboratoire de Phtonique et de Nanostructures, Marcoussis, France — 7SwissFEL, Paul Scherrer Institut, Villigen PSI, Switzerland — 8Singulus Technologies AG, Kahl am Main, Germany
We report on measurements to deduce the spin torque contribution of current induced domain wall motion in out-of-plane magnetized multilayer materials. Using complementary measurement techniques such as the current-field equivalency and thermally activated domain wall hopping allow us not only to separate the torque terms on the same material, but also to gauge their accuracy and validity. The extension of these techniques to characterize novel materials reveals not only the predicted dominant non-adiabatic spin torque as in the Co/Pt multilayer nanowires, but also a dominant adiabatic torque in Co/Ni multilayer nanowires highlighting the importance of the materials composition for the acting torques.