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Chiral symmetry breaking of magnetic vortices by sample roughness

Arne Vansteenkiste UGent, M. Weigand, M. Curcic, H. Stoll, B. Van Waeyenberge and G. Schütz (2009) New Journal of Physics. 11.
abstract
Finite-element micromagnetic simulations are employed to study the chiral symmetry breaking of magnetic vortices, caused by the surface roughness of thin-film magnetic structures. An asymmetry between vortices with different core polarizations has been experimentally observed for square-shaped platelets. E.g., the threshold fields for vortex core switching were found to differ for core up and down. This asymmetry was however not expected for these symmetrically-shaped structures, where both core polarizations should behave symmetrically. Three-dimensional finite element simulations are employed to show that a small surface roughness can break the symmetry between vortex cores pointing up and down. A relatively small sample roughness is found sufficient to reproduce the experimentally observed asymmetries. It arises from the lack of mirror-symmetry of the rough thin-film structures, which causes vortices with different handedness to exhibit asymmetric dynamics.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
journal title
New Journal of Physics
New J. Phys.
volume
11
pages
063006 -
Web of Science type
Article
Web of Science id
000266775600006
JCR category
PHYSICS, MULTIDISCIPLINARY
JCR impact factor
3.312 (2009)
JCR rank
12/71 (2009)
JCR quartile
1 (2009)
ISSN
1367-2630
DOI
10.1088/1367-2630/11/6/063006
language
English
UGent publication?
yes
classification
A1
copyright statement
I have retained and own the full copyright for this publication
id
735024
handle
http://hdl.handle.net/1854/LU-735024
date created
2009-08-27 14:48:53
date last changed
2009-09-07 15:54:53
@article{735024,
  abstract     = {Finite-element micromagnetic simulations are employed to study the chiral symmetry breaking of magnetic vortices, caused by the surface roughness of thin-film magnetic structures.  An asymmetry between vortices with different core polarizations has been experimentally observed for square-shaped platelets. E.g., the threshold fields for vortex core switching were found to differ for core up and down. This asymmetry was however not expected for these symmetrically-shaped structures, where both core polarizations should behave symmetrically. Three-dimensional finite element simulations are employed to show that a small surface roughness can break the symmetry between vortex cores pointing up and down. A relatively small sample roughness is found sufficient to reproduce the experimentally observed asymmetries. It arises from the lack of mirror-symmetry of the rough thin-film structures, which causes vortices with different handedness to exhibit asymmetric dynamics.},
  author       = {Vansteenkiste, Arne and Weigand, M. and Curcic, M. and Stoll, H. and Van Waeyenberge, B. and Sch{\"u}tz, G.},
  issn         = {1367-2630},
  journal      = {New Journal of Physics},
  language     = {eng},
  title        = {Chiral symmetry breaking of magnetic vortices by sample roughness},
  url          = {http://dx.doi.org/10.1088/1367-2630/11/6/063006},
  volume       = {11},
  year         = {2009},
}

Chicago
Vansteenkiste, Arne, M. Weigand, M. Curcic, H. Stoll, B. Van Waeyenberge, and G. Schütz. 2009. “Chiral Symmetry Breaking of Magnetic Vortices by Sample Roughness.” New Journal of Physics 11: 063006.
APA
Vansteenkiste, Arne, Weigand, M., Curcic, M., Stoll, H., Van Waeyenberge, B., & Schütz, G. (2009). Chiral symmetry breaking of magnetic vortices by sample roughness. New Journal of Physics, 11, 063006.
Vancouver
1.
Vansteenkiste A, Weigand M, Curcic M, Stoll H, Van Waeyenberge B, Schütz G. Chiral symmetry breaking of magnetic vortices by sample roughness. New Journal of Physics. 2009;11:063006.
MLA
Vansteenkiste, Arne, M. Weigand, M. Curcic, et al. “Chiral Symmetry Breaking of Magnetic Vortices by Sample Roughness.” New Journal of Physics 11 (2009): 063006. Print.