Large Dzyaloshinskii-Moriya interaction induced by chemisorbed oxygen on a ferromagnet surface
Abstract
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.
- Authors:
-
[1];
[2];
[4];
[3];
[2];
[5];
[7];
[8];
[9]
- Univ. of California, Davis, CA (United States)
- Univ. Complutense Madrid (Spain)
- Forschungszentrum Juelich and JARA (Germany)
- Univ. of California, Berkeley, CA (United States); Univ. of Hamburg (Germany)
- Nanjing Univ. (China)
- Univ. of Hamburg (Germany)
- Univ. Autonoma de Madrid (Spain)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Univ. of California, Davis, CA (United States); Georgetown Univ., Washington, DC (United States)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); Univ. of California; National Institute of Standards and Technology (NIST); Ministry of Economic Affairs and Digital Transformation of Spain (MINECO); Comunidad de Madrid; Defense Advanced Research Projects Agency (DARPA); European Union (EU); German Research Foundation (DFG); National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC); MECD (Spain)
- OSTI Identifier:
- 1695752
- Grant/Contract Number:
- AC02-05CH11231; DMR-1610060; DMR-1905468; MRP-17-454963; 2018-NE-2861; MAT2017-87072-C4-2-P; S2018/NMT4321; HR0011831554; H2020-INFRAEDI-2018-1; SPP-2137; SFB-1238; 748006; 2017YFA0303202; 11734006; 51571109; MAT2014-52477; FIS2017-82415-R; PRX17/00557
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Science Advances
- Additional Journal Information:
- Journal Volume: 6; Journal Issue: 33; Journal ID: ISSN 2375-2548
- Publisher:
- AAAS
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Chen, Gong, Mascaraque, Arantzazu, Jia, Hongying, Zimmermann, Bernd, Robertson, MacCallum, Conte, Roberto Lo, Hoffmann, Markus, González Barrio, Miguel Angel, Ding, Haifeng, Wiesendanger, Roland, Michel, Enrique G., Blügel, Stefan, Schmid, Andreas K., and Liu, Kai. Large Dzyaloshinskii-Moriya interaction induced by chemisorbed oxygen on a ferromagnet surface. United States: N. p., 2020.
Web. doi:10.1126/sciadv.aba4924.
Chen, Gong, Mascaraque, Arantzazu, Jia, Hongying, Zimmermann, Bernd, Robertson, MacCallum, Conte, Roberto Lo, Hoffmann, Markus, González Barrio, Miguel Angel, Ding, Haifeng, Wiesendanger, Roland, Michel, Enrique G., Blügel, Stefan, Schmid, Andreas K., & Liu, Kai. Large Dzyaloshinskii-Moriya interaction induced by chemisorbed oxygen on a ferromagnet surface. United States. https://doi.org/10.1126/sciadv.aba4924
Chen, Gong, Mascaraque, Arantzazu, Jia, Hongying, Zimmermann, Bernd, Robertson, MacCallum, Conte, Roberto Lo, Hoffmann, Markus, González Barrio, Miguel Angel, Ding, Haifeng, Wiesendanger, Roland, Michel, Enrique G., Blügel, Stefan, Schmid, Andreas K., and Liu, Kai. Fri .
"Large Dzyaloshinskii-Moriya interaction induced by chemisorbed oxygen on a ferromagnet surface". United States. https://doi.org/10.1126/sciadv.aba4924. https://www.osti.gov/servlets/purl/1695752.
@article{osti_1695752,
title = {Large Dzyaloshinskii-Moriya interaction induced by chemisorbed oxygen on a ferromagnet surface},
author = {Chen, Gong and Mascaraque, Arantzazu and Jia, Hongying and Zimmermann, Bernd and Robertson, MacCallum and Conte, Roberto Lo and Hoffmann, Markus and González Barrio, Miguel Angel and Ding, Haifeng and Wiesendanger, Roland and Michel, Enrique G. and Blügel, Stefan and Schmid, Andreas K. and Liu, Kai},
abstractNote = {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.},
doi = {10.1126/sciadv.aba4924},
journal = {Science Advances},
number = 33,
volume = 6,
place = {United States},
year = {Fri Aug 14 00:00:00 EDT 2020},
month = {Fri Aug 14 00:00:00 EDT 2020}
}
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