Spin-wave frequency multiplication by magnetic vortex cores
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866912160691519488 |
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| author | Wang, Cheng-Jie Li, Yuxin Ding, Zhe Wang, Pengfei Shi, Fazhan Du, Jiangfeng |
| author_facet | Wang, Cheng-Jie Li, Yuxin Ding, Zhe Wang, Pengfei Shi, Fazhan Du, Jiangfeng |
| contents | Frequency multiplication involves generating harmonics from an input frequency, a technique particularly useful for integrating spin-wave devices operating at different frequencies. While topological magnetic textures offer distinct advantages in spin-wave applications, frequency multiplication has not yet been observed in these structures. Here, we study the magnetization dynamics of magnetic vortices formed in micron-sized disks and squares via wide-field magnetic imaging. We found the occurrence of coherent spin-wave harmonics arising from the gyration of vortex cores driven by microwave fields. This phenomenon reveals a universal mechanism where the periodical motion of delta function-like objects such as vortex cores gives rise to a frequency comb. Our results pave the way for creating nanoscale, tunable spin-based frequency multipliers and open new possibilities for frequency comb generation in a variety of systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_13784 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Spin-wave frequency multiplication by magnetic vortex cores Wang, Cheng-Jie Li, Yuxin Ding, Zhe Wang, Pengfei Shi, Fazhan Du, Jiangfeng Mesoscale and Nanoscale Physics Quantum Physics Frequency multiplication involves generating harmonics from an input frequency, a technique particularly useful for integrating spin-wave devices operating at different frequencies. While topological magnetic textures offer distinct advantages in spin-wave applications, frequency multiplication has not yet been observed in these structures. Here, we study the magnetization dynamics of magnetic vortices formed in micron-sized disks and squares via wide-field magnetic imaging. We found the occurrence of coherent spin-wave harmonics arising from the gyration of vortex cores driven by microwave fields. This phenomenon reveals a universal mechanism where the periodical motion of delta function-like objects such as vortex cores gives rise to a frequency comb. Our results pave the way for creating nanoscale, tunable spin-based frequency multipliers and open new possibilities for frequency comb generation in a variety of systems. |
| title | Spin-wave frequency multiplication by magnetic vortex cores |
| topic | Mesoscale and Nanoscale Physics Quantum Physics |
| url | https://arxiv.org/abs/2412.13784 |