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Home > Issues > SearchTunable Domain Wall Chirality by Changing Co/Pt Multilayer Repeat Numbers
Journal of Magnetics, Volume 26, Number 1, 31 Mar 2021, Pages 1-6
Lin Huang (Department of Physics, Chungbuk National University), Sang-Hyuk Lee (Department of Physics, Chungbuk National University), Nam-Hui Kim (Department of Emerging Materials Science, DGIST), Dae-Yun Kim (Department of Physics and Institute of Applied Physics, Seoul National University), June-Seo Kim (Division of Nanotechnology, DGIST), Chun-Yeol You (Department of Emerging Materials Science, DGIST), Sug-Bong Choe (Department of Physics and Institute of Applied Physics, Seoul National University), Dong-Hyun Kim * 
(Department of Physics, Chungbuk National University)
(Department of Physics, Chungbuk National University)
Abstract
The chirality of a magnetic domain wall was modified in ultrathin ferromagnetic Co/Pt multilayer films by
varying the repeat number n. Direct observations of field-driven asymmetric wall motion revealed a change in
sign of the Dzyaloshinskii-Moriya interaction coefficient from positive (n = 1, 2, and 3) to negative (n = 4),
implying the domain wall chirality changes from a left- to right-handed Néel wall. These findings provide a way
to control the domain wall chirality in multilayers simply by changing the repeat numbers.
varying the repeat number n. Direct observations of field-driven asymmetric wall motion revealed a change in
sign of the Dzyaloshinskii-Moriya interaction coefficient from positive (n = 1, 2, and 3) to negative (n = 4),
implying the domain wall chirality changes from a left- to right-handed Néel wall. These findings provide a way
to control the domain wall chirality in multilayers simply by changing the repeat numbers.
Keywords: Dzyaloshinskii-Moriya interaction; magnetic domain wall; domain wall chirality
DOI: https://doi.org/10.4283/JMAG.2021.26.1.001
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