Correlation between spin structure oscillations and domain wall velocities

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...

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Bibliographic Details
Published in:Nature communications Vol. 4; no. 1; p. 2328
Main Authors: Bisig, André, Stärk, Martin, Mawass, Mohamad-Assaad, Moutafis, Christoforos, Rhensius, Jan, Heidler, Jakoba, Büttner, Felix, Noske, Matthias, Weigand, Markus, Eisebitt, Stefan, Tyliszczak, Tolek, Van Waeyenberge, Bartel, Stoll, Hermann, Schütz, Gisela, Kläui, Mathias
Format: Journal Article
Language:English
Published: London Nature Publishing Group UK 27.08.2013
Nature Publishing Group
Nature Pub. Group
Subjects:
639/766/119
639/925
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Humanities and Social Sciences
multidisciplinary
NANOSCIENCE AND NANOTECHNOLOGY
Science
Science & Technology - Other Topics
Science (multidisciplinary)
ISSN:2041-1723, 2041-1723
Online Access:Get full text
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Summary: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. A prerequisite for using domain walls in logic or sensing devices is a thorough knowledge of the properties and precise control. Here the authors monitor the domain wall motion in curved nanowires by stroboscopic imaging and find a regime of oscillating velocity and spin structure below the Walker breakdown.
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AC02-05CH11231
USDOE Office of Science (SC), Basic Energy Sciences (BES)
ISSN:2041-1723
2041-1723
DOI:10.1038/ncomms3328