Modification of Dzyaloshinskii-Moriya-interaction-stabilized domain wall 
chirality by driving currents

Karnad, G. V.; Freimuth, F.; Martinez, E.; Lo Conte, R.; Gubbiotti, G.; Schulz, T.; Senz, S.; Ocker, B.; Mokrousov, Y.; Klaeui, M.

doi:10.1103/PhysRevLett.121.147203

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Modification of Dzyaloshinskii-Moriya-interaction-stabilized domain wall chirality by driving currents

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Senz, S.
Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society;

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https://doi.org/10.1103/PhysRevLett.121.147203
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Citation

Karnad, G. V., Freimuth, F., Martinez, E., Lo Conte, R., Gubbiotti, G., Schulz, T., et al. (2018). Modification of Dzyaloshinskii-Moriya-interaction-stabilized domain wall chirality by driving currents. Physical Review Letters, 121(14): 147203. doi:10.1103/PhysRevLett.121.147203.

Cite as: https://hdl.handle.net/21.11116/0000-0009-28F1-A

Abstract

We measure and analyze the chirality of Dzyaloshinskii-Moriya-interaction (DMI) stabilized spin textures in multilayers of Ta|Co₂₀F₆₀B₂₀|MgO. The effective DMI is measured experimentally using domain wall motion measurements, both in the presence (using spin-orbit torques) and absence of driving currents (using magnetic fields). We observe that the current-induced domain wall motion yields a change in effective DMI magnitude and opposite domain wall chirality when compared to field-induced domain wall motion (without current). We explore this effect, which we refer to as current-induced DMI, by providing possible explanations for its emergence, and explore the possibility of its manifestation in the framework of recent theoretical predictions of DMI modifications due to spin currents.