Berlin 2012 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 20: Poster I - Biomagnetism, FePt Nanoparticles, Magnetic Particles/Clusters, Magnetic Materials, Magnetic Semiconductors, Half-metals/Oxides, Multiferroics, Topological Insulators, Spin structures/Phase transitions, Electron theory/Computational micromagnetics, Magnetic coupling phenomena/Exchange bias, Spin-dependent transport, Spin injection/spin currents, Magnetization/Demagnetization dynamics, Magnetic measurement techniques
MA 20.83: Poster
Dienstag, 27. März 2012, 12:15–15:15, Poster A
Field-induced magnetization dynamics in dot patterned CoB/Pt multilayer structures — •F. Büttner1,2,3,4, C. Moutafis2,3, A. Bisig1,2,3,6, C.M. Günter4, J. Geilhufe5, M. Schneider4, C. v. Korff Schmiesing4, M. Hantschmann4, M. Riemeier4, J. Mohanty4, S. Schaffert4, J. Franken7, R. Lavrijsen7, H. J. M. Swagten7, H. Stoll8, M. Weigand5,8, M. Kläui1,2,3,6, and S. Eisebitt4,5 — 1Uni Mainz, 55128 Mainz, Germany — 2PSI, 5232 Villigen, Switzerland — 3EPF Lausanne, 1015 Lausanne, Switzerland — 4TU Berlin, 10623 Berlin, Germany — 5HZB, 12489 Berlin, Germany — 6Uni Konstanz, 78457 Konstanz, Germany — 7TU Eindhoven, 5612 AZ Eindhoven, Netherlands — 8MPI für Metallforschung, 70569 Stuttgart, Germany
The controlled movement of nanometer sized magnetic domains on the (sub-) nanosecond time scale is of key importance for the development of new magnetic devices in storage and computing technology. While magnetization dynamics in in-plane magnetized materials has been intensely studied, domain sizes are too large for most state-of-the-art applications. In out-of-plane materials, however, we find narrow domains and domain walls, but these are much more sensitive to local pinning, thus making controlled displacements extremely challenging. We present here high resolution magnetic images of low pinning CoB/Pt multilayer structures and demonstrate the suitability of this material for controlled and reproducible field-induced dynamics of the magnetic domains on the nanosecond time scale.