Dresden 2014 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 30: Experimental methods and magnetic imaging
MA 30.10: Vortrag
Mittwoch, 2. April 2014, 17:30–17:45, HSZ 403
Synchronous precessional motion of multiple domain walls in a ferromagnetic nanowire by perpendicular field pulses — •Mohamad-Assaad Mawass1,2, June-Seo Kim1,3, Andre Bisig1,2, Benjamin Krüger1, Robert Reeve1, Tomek Schulz1, Felix Büttner1,5, Jungbum Yoon4, Chun-Yeol You4, Markus Weigand2, Hermann Stoll2, Gisela Schütz2, Henk J. M. Swagten3, Bert Koopmans3, Stefan Eisebitt5, and Mathias Kläui1 — 1Johannes Gutenberg-Universität Mainz, Germany — 2Max-Planck-Institut für Intelligente Systeme, Stuttgart, Germany — 3Eindhoven University of Technology, The Netherlands — 4Inha University, Republic of Korea — 5Technische Universität Berlin
Magnetic storage and logic devices based on magnetic domain wall (DW) motion rely on the precise and synchronous displacement of multiple domains and DWs. The conventional approach using magnetic fields efficiently drives DWs but does not allow for the necessary synchronous motion of multiple domains. As an alternative method, synchronous current-induced DW motion has been studied, but the required high critical current densities prevent widespread use in devices. Here, we demonstrate a radically different approach: We use out-of-plane magnetic field pulses to move in-plane domains, thus combining the efficiency of field-induced magnetization dynamics with the ability to move neighbouring domains and DWs in the same direction. the displacement can be understood from the acting torques.