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Spin-Wave Modes and Their Intense Excitation Effects in Skyrmion Crystals
Open accessAbstract
We theoretically study spin-wave modes and their intense excitations activated by microwave magnetic fields in the Skyrmion-crystal phase of insulating magnets by numerically analyzing a two-dimensional spin model using the Landau-Lifshitz-Gilbert equation. Two peaks of spin-wave resonances with frequencies of ∼1 GHz are found for in-plane ac magnetic field where distribution of the out-of-plane spin components circulates around each Skyrmion core. Directions of the circulations are opposite between these two modes, and hence the spectra exhibit a salient dependence on the circular polarization of irradiating microwave. A breathing-type mode is also found for an out-of-plane ac magnetic field. By intensively exciting these collective modes, melting of the Skyrmion crystal accompanied by a redshift of the resonant frequency is achieved within nanoseconds.
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Cited by
A strategy for the design of skyrmion racetrack memories
Tomasello, R., Martinez, E., Zivieri, R., Torres, L., Carpentieri, M., & Finocchio, G. (2014) · Scientific Reports · doi:10.1038/srep06784 · Cited by 963
Tokura, Y., & Kanazawa, N. (2021) · Chemical Reviews · doi:10.1021/acs.chemrev.0c00297 · Cited by 726
Skyrmions in magnetic multilayers
Jiang, W., Chen, G., Liu, K., Zang, J., te Velthuis, S. G. E., & Hoffmann, A. (2017) · Physics Reports · doi:10.1016/j.physrep.2017.08.001 · Cited by 566
Extended Skyrmion Phase in EpitaxialFeGe(111)Thin Films
Huang, S. X., & Chien, C. L. (2012) · Physical Review Letters · doi:10.1103/physrevlett.108.267201 · Cited by 489
Observation of Magnetic Excitations of Skyrmion Crystal in a Helimagnetic InsulatorCu2OSeO3
Onose, Y., Okamura, Y., Seki, S., Ishiwata, S., & Tokura, Y. (2012) · Physical Review Letters · doi:10.1103/physrevlett.109.037603 · Cited by 356
Metadata
- Authors
- Mochizuki, M.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2012-01-05
- Volume
- 108
- Issue
- 1
- Pages
- 017601-017601
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2012078831
- Cited by
- 404
- References
- 0
- FWCI
- 11.63
- Type
- journal article
- Language
- en
- Open access
- green
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