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research article

Nonadiabatic Spin Torque Investigated Using Thermally Activated Magnetic Domain Wall Dynamics

Eltschka, M.
•
Woetzel, M.
•
Rhensius, J.
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2010
Physical Review Letters

Using transmission electron microscopy, we investigate the thermally activated motion of domain walls (DWs) between two positions in Permalloy (Ni80Fe20) nanowires at room temperature. We show that this purely thermal motion is well described by an Arrhenius law, allowing for a description of the DW as a quasiparticle in a one-dimensional potential landscape. By injecting small currents, the potential is modified, allowing for the determination of the nonadiabatic spin torque: beta(t) = 0.010 +/- 0.004 for a transverse DW and beta(v) = 0.073 +/- 0.026 for a vortex DW. The larger value is attributed to the higher magnetization gradients present.

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Type
research article
DOI
10.1103/PhysRevLett.105.056601
Web of Science ID

WOS:000280472800008

Author(s)
Eltschka, M.
Woetzel, M.
Rhensius, J.
Krzyk, S.
Nowak, U.
Klaeui, M.
Kasama, T.
Dunin-Borkowski, R. E.
Heyderman, L. J.
van Driel, H. J.
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Date Issued

2010

Published in
Physical Review Letters
Volume

105

Issue

5

Article Number

056601

Subjects

Nanostructures

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LNSD  
Available on Infoscience
December 16, 2011
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/75306
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