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

Roberto Lo Conte | Zendy; G. V. Karnad | Zendy; E. Martı́nez | Zendy; Kyujoon Lee | Zendy; Nam-Hui Kim | Zendy; DongSoo Han | Zendy; Junsu Kim | Zendy; Sebastian Prenzel | Zendy; T. Schulz | Zendy; ChunYeol You | Zendy; H. J. M. Swagten | Zendy; Mathias Kläui | Zendy

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

Author(s) -

Roberto Lo Conte,

G. V. Karnad,

E. Martı́nez,

Kyujoon Lee,

Nam-Hui Kim,

DongSoo Han,

Junsu Kim,

Sebastian Prenzel,

T. Schulz,

ChunYeol You,

H. J. M. Swagten,

Mathias Kläui

Publication year - 2017

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4990694

Subject(s) - condensed matter physics , ferromagnetism , spin diffusion , spin (aerodynamics) , transverse plane , orbit (dynamics) , domain wall (magnetism) , layer (electronics) , spin hall effect , materials science , harmonic , diffusion , amplitude , physics , magnetization , magnetic field , optics , spin polarization , electron , composite material , thermodynamics , structural engineering , quantum mechanics , aerospace engineering , engineering

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.

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