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Magnetic vortex core reversal by excitation of spin waves

Matthias Kammerer, Markus Weigand, Michael Curcic, Matthias Noske, Markus Sproll, Arne Vansteenkiste UGent, Bartel Van Waeyenberge UGent, Hermann Stoll, Georg Woltersdorf and Christian H Back, et al. (2011) NATURE COMMUNICATIONS. 2.
abstract
Micron-sized magnetic platelets in the flux-closed vortex state are characterized by an in-plane curling magnetization and a nanometer-sized perpendicularly magnetized vortex core. Having the simplest non-trivial configuration, these objects are of general interest to micromagnetics and may offer new routes for spintronics applications. Essential progress in the understanding of nonlinear vortex dynamics was achieved when low-field core toggling by excitation of the gyrotropic eigenmode at sub-GHz frequencies was established. At frequencies more than an order of magnitude higher vortex state structures possess spin wave eigenmodes arising from the magneto-static interaction. Here we demonstrate experimentally that the unidirectional vortex core reversal process also occurs when such azimuthal modes are excited. These results are confirmed by micromagnetic simulations, which clearly show the selection rules for this novel reversal mechanism. Our analysis reveals that for spin-wave excitation the concept of a critical velocity as the switching condition has to be modified.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
FIELD, MOTION, STATE, DYNAMICS
journal title
NATURE COMMUNICATIONS
Nat. Commun.
volume
2
article_number
279
pages
6 pages
Web of Science type
Article
Web of Science id
000289983800017
JCR category
MULTIDISCIPLINARY SCIENCES
JCR impact factor
7.396 (2011)
JCR rank
4/54 (2011)
JCR quartile
1 (2011)
ISSN
2041-1723
DOI
10.1038/ncomms1277
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1233641
handle
http://hdl.handle.net/1854/LU-1233641
date created
2011-05-24 14:01:34
date last changed
2012-05-03 13:01:03
@article{1233641,
  abstract     = {Micron-sized magnetic platelets in the flux-closed vortex state are characterized by an in-plane curling magnetization and a nanometer-sized perpendicularly magnetized vortex core. Having the simplest non-trivial configuration, these objects are of general interest to micromagnetics and may offer new routes for spintronics applications. Essential progress in the understanding of nonlinear vortex dynamics was achieved when low-field core toggling by excitation of the gyrotropic eigenmode at sub-GHz frequencies was established. At frequencies more than an order of magnitude higher vortex state structures possess spin wave eigenmodes arising from the magneto-static interaction. Here we demonstrate experimentally that the unidirectional vortex core reversal process also occurs when such azimuthal modes are excited. These results are confirmed by micromagnetic simulations, which clearly show the selection rules for this novel reversal mechanism. Our analysis reveals that for spin-wave excitation the concept of a critical velocity as the switching condition has to be modified.},
  articleno    = {279},
  author       = {Kammerer, Matthias and Weigand, Markus and Curcic, Michael and Noske, Matthias and Sproll, Markus and Vansteenkiste, Arne and Van Waeyenberge, Bartel and Stoll, Hermann and Woltersdorf, Georg and Back, Christian H and Sch{\"u}tz, Gisela},
  issn         = {2041-1723},
  journal      = {NATURE COMMUNICATIONS},
  keyword      = {FIELD,MOTION,STATE,DYNAMICS},
  language     = {eng},
  pages        = {6},
  title        = {Magnetic vortex core reversal by excitation of spin waves},
  url          = {http://dx.doi.org/10.1038/ncomms1277},
  volume       = {2},
  year         = {2011},
}

Chicago
Kammerer, Matthias, Markus Weigand, Michael Curcic, Matthias Noske, Markus Sproll, Arne Vansteenkiste, Bartel Van Waeyenberge, et al. 2011. “Magnetic Vortex Core Reversal by Excitation of Spin Waves.” Nature Communications 2.
APA
Kammerer, M., Weigand, M., Curcic, M., Noske, M., Sproll, M., Vansteenkiste, A., Van Waeyenberge, B., et al. (2011). Magnetic vortex core reversal by excitation of spin waves. NATURE COMMUNICATIONS, 2.
Vancouver
1.
Kammerer M, Weigand M, Curcic M, Noske M, Sproll M, Vansteenkiste A, et al. Magnetic vortex core reversal by excitation of spin waves. NATURE COMMUNICATIONS. 2011;2.
MLA
Kammerer, Matthias, Markus Weigand, Michael Curcic, et al. “Magnetic Vortex Core Reversal by Excitation of Spin Waves.” NATURE COMMUNICATIONS 2 (2011): n. pag. Print.