Berlin 2012 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 23: Magnetization / Demagnetization Dynamics II
MA 23.7: Vortrag
Mittwoch, 28. März 2012, 11:30–11:45, H 1012
Spindynamics of individual permalloy nanowires — •Nathalie Reckers1, Zheng Duan2, Ilya Krivorotov2, Michael Farle1, and Jürgen Lindner1 — 1Fakultät für Physik und Center for Nanointegration Duisburg-Essen, Universität Duisburg-Essen, 47048 Duisburg, Germany — 2Department of Physics and Astronomy, University of California, Irvine, USA
Nanostructured single wires (600 nm* 80 μm* 20 nm) composed of Permalloy are investigated by dc electrically detected ferromagnetic resonance in a frequency range of 4-16 GHz at ambient temperature [1]. It is demonstrated that the quasi uniform mode and other localized spinwave modes in a single nanowire can be detected with high sensitivity in different measurement geometries, the external magnetic field being applied along easy and hard direction of the wire. Based on these multi-frequency measurements we observe that in nanostructured finite elements deviations to the widely employed Kittel-resonance equation are present. Examples will be discussed.
Financial support by DFG, SFB 491 is acknowledged.
[1] N. Mecking, Y. Y. Gui and C.-M. Hu, Phys. Rev. B, 224430, (2007)