Interfacial Dzyaloshinskii-Moriya interaction and dampinglike spin-orbit torque in [Co/Gd/Pt](N) magnetic multilayers

Authors
Nishimura, TomoeKim, Dae-YunKim, Duck-HoNam, Yune-SeokPark, Yong-KeunKim, Nam-HuiShiota, YoichiYou, Chun-YeolMin, Byoung-ChulChoe, Sug-BongOno, Teruo
Issue Date
2021-03-04
Publisher
AMER PHYSICAL SOC
Citation
Physical Review B, v.103, no.10
Abstract
Recently, magnetic multilayer systems have received again a great attention owing to their suitability for the generation of magnetic chiral spin structure. In this study, we experimentally investigated the interfacial Dzyaloshisnkii-Moriaya interaction (DMI) and the spin-Hall angle (SHA) of magnetic Co/Gd/Pt multilayers with respect to the repetition number N of the multilayers. The DMI and SHA are important variables that govern the stability and mobility of a homochiral spin structure, respectively. The experimental results show that the ratio between the DMI and the dipole energy from the domain wall gradually decreases as N increases, which is expected to be hard to achieve homochiral spin structure for larger N and the values of SHA remain constant irrespective of N. The observed SHA invariance indicates that the Pt layers in repetition have a negligible effect on the SHA.
ISSN
2469-9950
URI
https://pubs.kist.re.kr/handle/201004/117273
DOI
10.1103/PhysRevB.103.104409
Appears in Collections:
KIST Article > 2021
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