Large Dzyaloshinskii-Moriya interaction induced by chemisorbed oxygen on a ferromagnet surface
- 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)
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.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- Comunidad de Madrid; Defense Advanced Research Projects Agency (DARPA); European Union (EU); German Research Foundation (DFG); MECD (Spain); MINECO (Spain); National Institute of Standards and Technology (NIST); National Key R&D Program of China; National Natural Science Foundation of China (NNSFC); National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES); Univ. of California
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1695752
- Journal Information:
- Science Advances, Journal Name: Science Advances Journal Issue: 33 Vol. 6; ISSN 2375-2548
- Publisher:
- AAASCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Significant Dzyaloshinskii–Moriya interaction at graphene–ferromagnet interfaces due to the Rashba effect
Interfacial Dzyaloshinskii-Moriya interaction of antiferromagnetic materials
Journal Article
·
Sun May 27 20:00:00 EDT 2018
· Nature Materials
·
OSTI ID:1530366
Interfacial Dzyaloshinskii-Moriya interaction of antiferromagnetic materials
Journal Article
·
Mon Nov 30 19:00:00 EST 2020
· Physical Review. B
·
OSTI ID:1851739