Current-driven dynamics of Dzyaloshinskii domain walls in the presence of in-plane fields: Full micromagnetic and one-dimensional analysis
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Beach_Current-driven dynamics.pdf
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Author(s)
Martinez, Eduardo
Emori, Satoru
Perez, Noel
Torres, Luis
Beach, Geoffrey Stephen
Date Issued
June 2014
Journal
Journal of Applied Physics
Publisher
American Institute of Physics
Citation
Martinez, Eduardo, Satoru Emori, Noel Perez, Luis Torres, and Geoffrey S. D. Beach. “Current-Driven Dynamics of Dzyaloshinskii Domain Walls in the Presence of in-Plane Fields: Full Micromagnetic and One-Dimensional Analysis.” Journal of Applied Physics 115, no. 21 (June 7, 2014): 213909. © 2014 AIP Publishing LLC.
Version
Final published version
Abstract
Current-induced domain wall motion along high perpendicular magnetocrystalline anisotropy multilayers is studied by means of full micromagnetic simulations and a one-dimensional model in the presence of in-plane fields. We consider domain wall motion driven by the spin Hall effect in the presence of the Dzyaloshinskii-Moriya interaction (DMI). In the case of relatively weak DMI, the wall propagates without significant tilting of the wall plane, and the full micromagnetic results are quantitatively reproduced by a simple rigid one-dimensional model. By contrast, significant wall-plane tilting is observed in the case of strong DMI, and a one-dimensional description including the wall tilting is required to qualitatively describe the micromagnetic results. However, in this strong-DMI case, the one-dimensional model exhibits significant quantitative discrepancies from the full micromagnetic results, in particular, when high longitudinal fields are applied in the direction of the internal domain wall magnetization. It is also shown that, even under thermal fluctuations and edge roughness, the domain wall develops a net tilting angle during its current-induced motion along samples with strong DMI.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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DOI of Published Version
https://doi.org/10.1063/1.4881778
