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Magnetic antivortex-core reversal by circular-rotational spin currents

Thomas Kamionka, Michael Martens, Kang Wei Chou, Michael Curcic, Andre Drews, Gisela Schutz, Tolek Tyliszczak, Hermann Stoll, Bartel Van Waeyenberge UGent and Guido Meier (2010) PHYSICAL REVIEW LETTERS. 105(13).
abstract
Topological singularities occur as antivortices in ferromagnetic thin-film microstructures. Antivortices behave as two-dimensional oscillators with a gyrotropic eigenmode which can be excited resonantly by spin currents and magnetic fields. We show that the two excitation types couple in an opposing sense of rotation in the case of resonant antivortex excitation with circular-rotational currents. If the sense of rotation of the current coincides with the intrinsic sense of gyration of the antivortex, the coupling to the Oersted fields is suppressed and only the spin-torque contribution locks into the gyrotropic eigenmode. We report on the experimental observation of purely spin-torque induced antivortex-core reversal. The dynamic response of an isolated antivortex is imaged by time-resolved scanning transmission x-ray microscopy on its genuine time and length scale.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
PERMALLOY, EXCITATION
journal title
PHYSICAL REVIEW LETTERS
Phys. Rev. Lett.
volume
105
issue
13
article_number
137204
pages
4 pages
Web of Science type
Article
Web of Science id
000282054300008
JCR category
PHYSICS, MULTIDISCIPLINARY
JCR impact factor
7.621 (2010)
JCR rank
5/79 (2010)
JCR quartile
1 (2010)
ISSN
0031-9007
DOI
10.1103/PhysRevLett.105.137204
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1245283
handle
http://hdl.handle.net/1854/LU-1245283
date created
2011-05-27 11:25:37
date last changed
2011-06-10 12:49:35
@article{1245283,
  abstract     = {Topological singularities occur as antivortices in ferromagnetic thin-film microstructures. Antivortices behave as two-dimensional oscillators with a gyrotropic eigenmode which can be excited resonantly by spin currents and magnetic fields. We show that the two excitation types couple in an opposing sense of rotation in the case of resonant antivortex excitation with circular-rotational currents. If the sense of rotation of the current coincides with the intrinsic sense of gyration of the antivortex, the coupling to the Oersted fields is suppressed and only the spin-torque contribution locks into the gyrotropic eigenmode. We report on the experimental observation of purely spin-torque induced antivortex-core reversal. The dynamic response of an isolated antivortex is imaged by time-resolved scanning transmission x-ray microscopy on its genuine time and length scale.},
  articleno    = {137204},
  author       = {Kamionka, Thomas and Martens, Michael and Chou, Kang Wei and Curcic, Michael and Drews, Andre and Schutz, Gisela and Tyliszczak, Tolek and Stoll, Hermann and Van Waeyenberge, Bartel and Meier, Guido},
  issn         = {0031-9007},
  journal      = {PHYSICAL REVIEW LETTERS},
  keyword      = {PERMALLOY,EXCITATION},
  language     = {eng},
  number       = {13},
  pages        = {4},
  title        = {Magnetic antivortex-core reversal by circular-rotational spin currents},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.105.137204},
  volume       = {105},
  year         = {2010},
}

Chicago
Kamionka, Thomas, Michael Martens, Kang Wei Chou, Michael Curcic, Andre Drews, Gisela Schutz, Tolek Tyliszczak, Hermann Stoll, Bartel Van Waeyenberge, and Guido Meier. 2010. “Magnetic Antivortex-core Reversal by Circular-rotational Spin Currents.” Physical Review Letters 105 (13).
APA
Kamionka, T., Martens, M., Chou, K. W., Curcic, M., Drews, A., Schutz, G., Tyliszczak, T., et al. (2010). Magnetic antivortex-core reversal by circular-rotational spin currents. PHYSICAL REVIEW LETTERS, 105(13).
Vancouver
1.
Kamionka T, Martens M, Chou KW, Curcic M, Drews A, Schutz G, et al. Magnetic antivortex-core reversal by circular-rotational spin currents. PHYSICAL REVIEW LETTERS. 2010;105(13).
MLA
Kamionka, Thomas, Michael Martens, Kang Wei Chou, et al. “Magnetic Antivortex-core Reversal by Circular-rotational Spin Currents.” PHYSICAL REVIEW LETTERS 105.13 (2010): n. pag. Print.