Ultrafast formation of a large dynamic magnetic soliton
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866910276559831040 |
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| author | Wojewoda, Ondřej Mayr, Sina Gross, Miela J. Klíma, Jan Panda, Jaganandha Krčma, Jakub Holobrádek, Jakub Davídková, Kristýna Chumak, Andrii V. Gerasimchuk, Igor Verba, Roman Pirro, Philipp Weigand, Markus Finizio, Simone Lindner, Morris Dubs, Carsten Wang, Qi Wintz, Sebastian Ross, Caroline A. Urbánek, Michal |
| author_facet | Wojewoda, Ondřej Mayr, Sina Gross, Miela J. Klíma, Jan Panda, Jaganandha Krčma, Jakub Holobrádek, Jakub Davídková, Kristýna Chumak, Andrii V. Gerasimchuk, Igor Verba, Roman Pirro, Philipp Weigand, Markus Finizio, Simone Lindner, Morris Dubs, Carsten Wang, Qi Wintz, Sebastian Ross, Caroline A. Urbánek, Michal |
| contents | Nonlinear magnetization dynamics offers a rich variety of phenomena ranging from bistability to chaos. Here, we report the ultrafast formation of a dynamic magnetic soliton in thin ferrimagnetic garnet films with perpendicular magnetic anisotropy, driven by the microwave magnetic field of a microstrip antenna. Using time-resolved Brillouin light scattering microscopy and scanning transmission X-ray microscopy, we directly track the build-up of the large-angle precession state. The observed soliton is distinct from other nonlinear magnetic excitations in two key aspects: (i) it forms inside the linear spin-wave frequency band, and (ii) it is exceptionally large, reaching tens of microns beyond the antenna. We explain the soliton formation by the self-limiting mechanism upon a positive nonlinear frequency shift and the spatial extent of the near-field of the antenna. At large distances from the drive, the soliton collapses and emits short-wavelength spin waves via almost instantaneous spatial wavenumber conversion. Time-resolved measurements further reveal a small finite delay during soliton formation, while coherent long-range oscillations appear essentially simultaneously over distances up to 40 micrometers. These results establish microwave-driven solitons as a robust nonlinear phenomenon in thin-film garnets and suggest opportunities for fast, nonlocal manipulation of magnetic states and for applications in novel computational schemes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2606_00849 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Ultrafast formation of a large dynamic magnetic soliton Wojewoda, Ondřej Mayr, Sina Gross, Miela J. Klíma, Jan Panda, Jaganandha Krčma, Jakub Holobrádek, Jakub Davídková, Kristýna Chumak, Andrii V. Gerasimchuk, Igor Verba, Roman Pirro, Philipp Weigand, Markus Finizio, Simone Lindner, Morris Dubs, Carsten Wang, Qi Wintz, Sebastian Ross, Caroline A. Urbánek, Michal Mesoscale and Nanoscale Physics Nonlinear magnetization dynamics offers a rich variety of phenomena ranging from bistability to chaos. Here, we report the ultrafast formation of a dynamic magnetic soliton in thin ferrimagnetic garnet films with perpendicular magnetic anisotropy, driven by the microwave magnetic field of a microstrip antenna. Using time-resolved Brillouin light scattering microscopy and scanning transmission X-ray microscopy, we directly track the build-up of the large-angle precession state. The observed soliton is distinct from other nonlinear magnetic excitations in two key aspects: (i) it forms inside the linear spin-wave frequency band, and (ii) it is exceptionally large, reaching tens of microns beyond the antenna. We explain the soliton formation by the self-limiting mechanism upon a positive nonlinear frequency shift and the spatial extent of the near-field of the antenna. At large distances from the drive, the soliton collapses and emits short-wavelength spin waves via almost instantaneous spatial wavenumber conversion. Time-resolved measurements further reveal a small finite delay during soliton formation, while coherent long-range oscillations appear essentially simultaneously over distances up to 40 micrometers. These results establish microwave-driven solitons as a robust nonlinear phenomenon in thin-film garnets and suggest opportunities for fast, nonlocal manipulation of magnetic states and for applications in novel computational schemes. |
| title | Ultrafast formation of a large dynamic magnetic soliton |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2606.00849 |