Magnetic antivortex-core reversal by circular-rotational spin currents
- Author
- Thomas Kamionka, Michael Martens, Kang Wei Chou, Michael Curcic, Andre Drews, Gisela Schutz, Tolek Tyliszczak, Hermann Stoll, Bartel Van Waeyenberge (UGent) and Guido Meier
- Organization
- 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.
- Keywords
- PERMALLOY, EXCITATION
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-1245283
- MLA
- Kamionka, Thomas, et al. “Magnetic Antivortex-Core Reversal by Circular-Rotational Spin Currents.” PHYSICAL REVIEW LETTERS, vol. 105, no. 13, 2010, doi:10.1103/PhysRevLett.105.137204.
- APA
- Kamionka, T., Martens, M., Chou, K. W., Curcic, M., Drews, A., Schutz, G., … Meier, G. (2010). Magnetic antivortex-core reversal by circular-rotational spin currents. PHYSICAL REVIEW LETTERS, 105(13). https://doi.org/10.1103/PhysRevLett.105.137204
- Chicago author-date
- 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). https://doi.org/10.1103/PhysRevLett.105.137204.
- Chicago author-date (all authors)
- 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). doi:10.1103/PhysRevLett.105.137204.
- 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).
- IEEE
- [1]T. Kamionka et al., “Magnetic antivortex-core reversal by circular-rotational spin currents,” PHYSICAL REVIEW LETTERS, vol. 105, no. 13, 2010.
@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}}, keywords = {{PERMALLOY,EXCITATION}}, language = {{eng}}, number = {{13}}, pages = {{4}}, title = {{Magnetic antivortex-core reversal by circular-rotational spin currents}}, url = {{http://doi.org/10.1103/PhysRevLett.105.137204}}, volume = {{105}}, year = {{2010}}, }
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