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

Lo Conte R, Karnad GV, Martinez E, Lee K, Kim NH, Han DS, Kim JS, Prenzel S, Schulz T, You CY, Swagten HJM, Klaeui M (2017)

Publication Type: Journal article

Publication year: 2017

Journal

AIP Advances AIP Publishing

Book Volume: 7

Article Number: 065317

Journal Issue: 6

DOI: 10.1063/1.4990694

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.

Involved external institutions

Johannes Gutenberg-Universität Mainz (JGU) DE Germany (DE) University of Salamanca / Universidad de Salamanca ES Spain (ES) Daegu Gyeongbuk Institute of Science and Technology KR Korea, Republic of (KR) Eindhoven University of Technology / Technische Universiteit Eindhoven (TU/e) NL Netherlands (NL)

How to cite

APA:

Lo Conte, R., Karnad, G.V., Martinez, E., Lee, K., Kim, N.-H., Han, D.-S.,... Klaeui, M. (2017). Ferromagnetic layer thickness dependence of the Dzyaloshinskii-Moriya interaction and spin-orbit torques in Pt\Co\AlOx. AIP Advances, 7(6). https://doi.org/10.1063/1.4990694

MLA:

Lo Conte, Roberto, et al. "Ferromagnetic layer thickness dependence of the Dzyaloshinskii-Moriya interaction and spin-orbit torques in Pt\Co\AlOx." AIP Advances 7.6 (2017).

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