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Comparison between collective coordinate models for domain wall motion in PMA nanostrips in the presence of the Dzyaloshinskii-Moriya interaction

Jasper Vandermeulen, S.A. Nasseri, Ben Van de Wiele, G. Durin, Bartel Van Waeyenberge UGent and Luc Dupré UGent (2018) JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS . 449. p.337-352
abstract
Lagrangian-based collective coordinate models for magnetic domain wall (DW) motion rely on an ansatz for the DW profile and a Lagrangian approach to describe the DW motion in terms of a set of time-dependent collective coordinates: the DW position, the DW magnetization angle, the DW width and the DW tilting angle. Another approach was recently used to derive similar equations of motion by averaging the Landau-Lifshitz-Gilbert equation without any ansatz, and identifying the relevant collective coordinates afterwards. In this paper, we use an updated version of the semi-analytical equations to compare the Lagrangian-based collective coordinate models with micromagnetic simulations for field- and STT-driven (spin-transfer torque-driven) DW motion in Pt/CoFe/MgO and Pt/Co/AlOx nanostrips. Through this comparison, we assess the accuracy of the different models, and provide insight into the deviations of the models from simulations. It is found that the lack of terms related to DW asymmetry in the Lagrangian-based collective coordinate models significantly contributes to the discrepancy between the predictions of the most accurate Lagrangian-based model and the micromagnetic simulations in the field-driven case. This is in contrast to the STT-driven case where the DW remains symmetric.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
journal title
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
J. Magn. Magn. Mater.
volume
449
pages
337 - 352
publisher
Elsevier BV
ISSN
0304-8853
DOI
10.1016/j.jmmm.2017.10.008
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
8535269
handle
http://hdl.handle.net/1854/LU-8535269
date created
2017-10-23 23:02:24
date last changed
2017-11-16 09:02:56
@article{8535269,
  abstract     = {Lagrangian-based collective coordinate models for magnetic domain wall (DW) motion rely on an ansatz for the DW profile and a Lagrangian approach to describe the DW motion in terms of a set of time-dependent collective coordinates: the DW position, the DW magnetization angle, the DW width and the DW tilting angle. Another approach was recently used to derive similar equations of motion by averaging the Landau-Lifshitz-Gilbert equation without any ansatz, and identifying the relevant collective coordinates afterwards. In this paper, we use an updated version of the semi-analytical equations to compare the Lagrangian-based collective coordinate models with micromagnetic simulations for field- and STT-driven (spin-transfer torque-driven) DW motion in Pt/CoFe/MgO and Pt/Co/AlOx nanostrips. Through this comparison, we assess the accuracy of the different models, and provide insight into the deviations of the models from simulations. It is found that the lack of terms related to DW asymmetry in the Lagrangian-based collective coordinate models significantly contributes to the discrepancy between the predictions of the most accurate Lagrangian-based model and the micromagnetic simulations in the field-driven case. This is in contrast to the STT-driven case where the DW remains symmetric.},
  author       = {Vandermeulen, Jasper and Nasseri, S.A. and Van de Wiele, Ben and Durin, G. and Van Waeyenberge, Bartel and Dupr{\'e}, Luc},
  issn         = {0304-8853},
  journal      = {JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS         },
  language     = {eng},
  pages        = {337--352},
  publisher    = {Elsevier BV},
  title        = {Comparison between collective coordinate models for domain wall motion in PMA nanostrips in the presence of the Dzyaloshinskii-Moriya interaction},
  url          = {http://dx.doi.org/10.1016/j.jmmm.2017.10.008},
  volume       = {449},
  year         = {2018},
}

Chicago
Vandermeulen, Jasper, S.A. Nasseri, Ben Van de Wiele, G. Durin, Bartel Van Waeyenberge, and Luc Dupré. 2018. “Comparison Between Collective Coordinate Models for Domain Wall Motion in PMA Nanostrips in the Presence of the Dzyaloshinskii-Moriya Interaction.” Journal of Magnetism and Magnetic Materials  449: 337–352.
APA
Vandermeulen, Jasper, Nasseri, S. A., Van de Wiele, B., Durin, G., Van Waeyenberge, B., & Dupré, L. (2018). Comparison between collective coordinate models for domain wall motion in PMA nanostrips in the presence of the Dzyaloshinskii-Moriya interaction. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  , 449, 337–352.
Vancouver
1.
Vandermeulen J, Nasseri SA, Van de Wiele B, Durin G, Van Waeyenberge B, Dupré L. Comparison between collective coordinate models for domain wall motion in PMA nanostrips in the presence of the Dzyaloshinskii-Moriya interaction. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  . Elsevier BV; 2018;449:337–52.
MLA
Vandermeulen, Jasper, S.A. Nasseri, Ben Van de Wiele, et al. “Comparison Between Collective Coordinate Models for Domain Wall Motion in PMA Nanostrips in the Presence of the Dzyaloshinskii-Moriya Interaction.” JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  449 (2018): 337–352. Print.