title: Correlation between spin structure oscillations and domain wall velocities.
abstract: Magnetic sensing and logic devices based on the motion of magnetic domain walls rely on the precise and deterministic control of the position and the velocity of individual magnetic domain walls in curved nanowires. Varying domain wall velocities have been predicted to result from intrinsic effects such as oscillating domain wall spin structure transformations and extrinsic pinning due to imperfections. Here we use direct dynamic imaging of the nanoscale spin structure that allows us for the first time to directly check these predictions. We find a new regime of oscillating domain wall motion even below the Walker breakdown correlated with periodic spin structure changes. We show that the extrinsic pinning from imperfections in the nanowire only affects slow domain walls and we identify the magnetostatic energy, which scales with the domain wall velocity, as the energy reservoir for the domain wall to overcome the local pinning potential landscape.
authors: 1] Department of Physics, University of Konstanz, Universitätsstrasse 10, 78457 Konstanz, Germany [2] Max Planck Institute for Intelligent Systems, Heisenbergstrasse 3, 70569 Stuttgart, Germany [3] SwissFEL, Paul Scherrer Institute, 5232 Villigen, Switzerland and Institute of Condensed Matter Physics, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland [4] Institut für Physik, Johannes Gutenberg Universität Mainz, 55128 Mainz, Germany.
authors: André
authors: A
authors: Bisig
authors: Martin
authors: M
authors: Stärk
authors: Mohamad-Assaad
authors: MA
authors: Mawass
authors: Christoforos
authors: C
authors: Moutafis
authors: Jan
authors: J
authors: Rhensius
authors: Jakoba
authors: J
authors: Heidler
authors: Felix
authors: F
authors: Büttner
authors: Matthias
authors: M
authors: Noske
authors: Markus
authors: M
authors: Weigand
authors: Stefan
authors: S
authors: Eisebitt
authors: Tolek
authors: T
authors: Tyliszczak
authors: Bartel
authors: B
authors: Van Waeyenberge
authors: Hermann
authors: H
authors: Stoll
authors: Gisela
authors: G
authors: Schütz
authors: Mathias
authors: M
authors: Kläui
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