2026-06-27T15:20:11Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/64902023-08-27T05:51:22Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
Chen, Gong
author
Mascaraque Susunaga, Arantzazu
author
Jia, Hongying
author
Zimmermann, Bernd
author
Robertson, MacCallum
author
Lo Conte, Roberto
author
Hoffmann, Markus
author
González Barrio, Miguel Ángel
author
Ding, Haifeng
author
Wiesendanger, Roland
2023-06-16T15:21:53Z
2023-06-16T15:21:53Z
2020-08
2375-2548
10.1126/sciadv.aba4924
https://hdl.handle.net/20.500.14352/6490
http://dx.doi.org/10.1126/sciadv.aba4924
https://advances.sciencemag.org/
The Dzyaloshinskii-Moriya interaction (DMI) is an antisymmetric exchange interaction that stabilizes chiral spin textures. It is induced by inversion symmetry breaking in noncentrosymmetric lattices or at interfaces. Recently, interfacial DMI has been found in magnetic layers adjacent to transition metals due to the spin-orbit coupling and at interfaces with graphene due to the Rashba effect. We report direct observation of strong DMI induced by chemisorption of oxygen on a ferromagnetic layer at room temperature. The sign of this DMI and its unexpectedly large magnitude-despite the low atomic number of oxygen-are derived by examining the oxygen coverage-dependent evolution of magnetic chirality. We find that DMI at the oxygen/ferromagnet interface is comparable to those at ferromagnet/transition metal interfaces; it has enabled direct tailoring of skyrmion's winding number at room temperature via oxygen chemisorption. This result extends the understanding of the DMI, opening up opportunities for the chemisorption-related design of spin-orbitronic devices.
eng
Atribución-NoComercial 3.0 España
Large Dzyaloshinskii-Moriya interaction induced by chemisorbed oxygen on a ferromagnet surface
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