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Strong bulk spin-orbit torques quantified in the van der Waals ferromagnet Fe3GeTe2open access

Authors
Martin, FranziskaLee, KyujoonSchmitt, MauriceLiedtke, AnnaShahee, AgaSimensen, Haakon ThomtScholz, TanjaSaunderson, Tom G.Go, DongwookGradhand, MartinMokrousov, YuriyDenneulin, ThibaudKovacs, AndrasLotsch, BettinaBrataas, ArneKlaeui, Mathias
Issue Date
2-1월-2023
Publisher
TAYLOR & FRANCIS INC
Keywords
Van der Waals; two-dimensional magnet; spin-orbit torque
Citation
MATERIALS RESEARCH LETTERS, v.11, no.1, pp.84 - 89
Journal Title
MATERIALS RESEARCH LETTERS
Volume
11
Number
1
Start Page
84
End Page
89
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/146456
DOI
10.1080/21663831.2022.2119108
ISSN
2166-3831
Abstract
The recent emergence of magnetic van der Waals materials allows for the investigation of current-induced magnetisation manipulation in two-dimensional materials. Uniquely, Fe3GeTe2 has a crystalline structure that allows for the presence of bulk spin-orbit torques (SOTs) that we quantify in a Fe3GeTe2 flake. From the symmetry of the measured torques, we identify current induced effective fields using harmonic analysis and find dominant bulk SOTs arising from the symmetry in the crystal structure. Our results show that Fe3GeTe2 can exhibit bulk SOTs in addition to the conventional interfacial SOTs enabling magnetisation manipulation even in thick flakes without the need for complex multilayer engineering. Impact statement Spin-orbit torques which demonstrates efficient magnetisation switching requires multilayer structures. In FeGe3Te2 van der Waals materials we demonstrate bulk spin-orbit torques in a sole material with possibilities for spintronics applications.
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