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Ferromagnetic layer thickness dependence of the Dzyaloshinskii-Moriya interaction and spin-orbit torques in Pt\Co\AlOx

Title
Ferromagnetic layer thickness dependence of the Dzyaloshinskii-Moriya interaction and spin-orbit torques in Pt\Co\AlOx
Authors
Lo Conte, R.Karnad, G. V.Martinez, E.Lee, K.Kim, N. -H.Han, D. -S.Kim, J. -S.Prenzel, S.Schulz, T.You, C. -Y.Swagten, H. J. M.Klaeui, M.
DGIST Authors
Kim, N. -H.; Kim, J. -S.; You, C. -Y.
Issue Date
2017-06
Citation
AIP Advances, 7(6)
Type
Article
Article Type
Article
Keywords
Current Induced DomainsDomain WallsDynamicsDzyaloshinskii Moriya InteractionFerromagnetic Layer ThicknessFerromagnetic MaterialsFerromagnetismFilmsdomain WallsMagnetizationMotion StudyPlatinumSecond HarmonicsSpin Diffusion LengthSpin Hall EffectSymmetrySystemsThickness DependenceVarying ThicknessWeak Ferromagnetism
ISSN
2158-3226
Abstract
We report the thickness dependence of the Dzyaloshinskii-Moriya interaction (DMI) and spin-orbit torques (SOTs) in Pt\Co(t)\AlOx, studied by current-induced domain wall (DW) motion and second-harmonic experiments. From the DW motion study, a monotonous decay of the effective DMI strength with increasing Co thickness is observed, in agreement with a DMI originating from the Pt\Co interface. The study of the ferromagnetic layer thickness dependence of spin-orbit torques reveals a more complex behavior. The observed thickness dependence suggests the spin-Hall effect in Pt as the main origin of the SOTs, with the measured SOT-fields amplitudes resulting from the interplay between the varying thickness and the transverse spin diffusion length in the Co layer. © 2017 Author(s).
URI
http://hdl.handle.net/20.500.11750/4168
DOI
10.1063/1.4990694
Publisher
American Institute of Physics Inc.
Files:
There are no files associated with this item.
Collection:
Emerging Materials ScienceETC1. Journal Articles
DGIST-LBNL Research Center for Emerging Materials1. Journal Articles
Emerging Materials ScienceSpin Phenomena for Information Nano-devices(SPIN) Lab1. Journal Articles


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