17 August 2014 Correlation between spin structure oscillations and domain wall velocities (presentation video)
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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. 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. We use direct dynamic imaging of the nanoscale spin structure 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 and we show that the extrinsic pinning from defects in the nanowire only affects slow domain walls.
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Andre Bisig, Martin Stärk, Mohamad-Assaad Mawass, Christoforos Moutafis, Jan Rhensius, Jakoba Heidler, Felix Büttner, Matthias Noske, Markus Weigand, Stefan Eisebitt, Tolek Tyliszczak, Bartel van Waeyenberge, Hermann Stoll, Gisela Schütz, Mathias Kläui, "Correlation between spin structure oscillations and domain wall velocities (presentation video)", Proc. SPIE 9167, Spintronics VII, 91671Y (17 August 2014); doi: 10.1117/12.2060802; https://doi.org/10.1117/12.2060802

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