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

Title
Interfacial Dzyaloshinskii-Moriya interaction and dampinglike spin-orbit torque in [Co/Gd/Pt]N magnetic multilayers
Author(s)
Nishimura, TomoeKim, Dae-YunKim, Duck-HoNam, Yune-SeokPark, Yong-KeunKim, Nam-HuiShiota, YoichiYou, Chun-YeolMin, Byoung-ChulChoe, Sug-BongOno, Teruo
Issued Date
2021-03
Citation
Physical Review B, v.103, no.10, pp.104409
Type
Article
Keywords
Domain wallsMagnetismSpin fluctuationsSpin orbit couplingDipole energyDzyaloshinskii-Moriya interactionHomochiralMagnetic multilayer systemsSpin orbitsSpin structuresMagnetic multilayers
ISSN
2469-9950
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. © 2021 American Physical Society.
URI
http://hdl.handle.net/20.500.11750/13763
DOI
10.1103/PhysRevB.103.104409
Publisher
American Physical Society
Related Researcher
  • 유천열 You, Chun-Yeol 화학물리학과
  • Research Interests Spintronics; Condensed Matter Physics; Magnetic Materials & Thin Films; Micromagnetic Simulations; Spin Nano-Devices
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Department of Physics and Chemistry Spin Phenomena for Information Nano-devices(SPIN) Lab 1. Journal Articles

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