journal article·2017-06-01Open access

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

R. Lo Conte, G. V. Karnad, E. Martinez, K. Lee, N.-H. Kim, D.-S. Han, J.-S. Kim, S. Prenzel, T. Schulz, C.-Y. You, H. J. M. Swagten, M. Kläui

AIP Advances· Volume 7· Issue 6

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.
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Research context

OpenAlex topics: Magnetic properties of thin films · Advanced Memory and Neural Computing · Magnetic Properties and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Johannes Gutenberg-Uni v ersität, Institut für Physik 1 , Staudinger Weg 7, 55128 Mainz, Germany

Graduate School of Excellence “Materials Science in Mainz”(MAINZ) 2 , Staudinger Weg 9, 55128 Mainz, Germany

Departamento Fisica Applicada, Uni v ersidad de Salamanca 3 , plaza de los Caidos s/n, E-38008 Salamanca, Spain

Department of Emerging Materials Science, DGIST 4 , Daegu 42988, Republic of Korea

Department of Applied Physics, Center for NanoMaterials, Eindho v en Uni v ersity of Technology 5 , P.O. Box 513, 5600 MB Eindho v en, The Netherlands

Research Center for Emerging Materials, DGIST 6 , Daegu 42988, Republic of Korea

Funding

DGIST R&D Program of the Ministry of Science, ICT and Future Planning · Europen Union · NRF-DFG Collaborative Research Program · Research Center of Innovative and Emerging Materials at Johannes Gutenberg University · Deutsche Forschungsgemeinschaft · Graduate School of Excellence Materials Science In Mainz · National Research Foundation of Korea

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