Long-distance propagation of high-velocity antiferromagnetic spin waves
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arXiv
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| Auteurs principaux: | , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2022
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| _version_ | 1866911483132116992 |
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| author | Wang, Hanchen Yuan, Rundong Zhou, Yongjian Zhang, Yuelin Chen, Jilei Liu, Song Jia, Hao Yu, Dapeng Ansermet, Jean-Philippe Song, Cheng Yu, Haiming |
| author_facet | Wang, Hanchen Yuan, Rundong Zhou, Yongjian Zhang, Yuelin Chen, Jilei Liu, Song Jia, Hao Yu, Dapeng Ansermet, Jean-Philippe Song, Cheng Yu, Haiming |
| contents | We report on coherent propagation of antiferromagnetic (AFM) spin waves over a long distance ($\sim$10 $μ$m) at room temperature in a canted AFM $α$-Fe$_2$O$_3$ with the Dzyaloshinskii-Moriya interaction (DMI). Unprecedented high group velocities (up to 22.5 km/s) are characterized by microwave transmission using all-electrical spin wave spectroscopy. We derive analytically AFM spin-wave dispersion in the presence of the DMI which accounts for our experimental results. The AFM spin waves excited by nanometric coplanar waveguides with large wavevectors enter the exchange regime and follow a quasi-linear dispersion relation. Fitting of experimental data with our theoretical model yields an AFM exchange stiffness length of 1.7 angstrom. Our results provide key insights on AFM spin dynamics and demonstrate high-speed functionality for AFM magnonics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2211_10989 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Long-distance propagation of high-velocity antiferromagnetic spin waves Wang, Hanchen Yuan, Rundong Zhou, Yongjian Zhang, Yuelin Chen, Jilei Liu, Song Jia, Hao Yu, Dapeng Ansermet, Jean-Philippe Song, Cheng Yu, Haiming Materials Science We report on coherent propagation of antiferromagnetic (AFM) spin waves over a long distance ($\sim$10 $μ$m) at room temperature in a canted AFM $α$-Fe$_2$O$_3$ with the Dzyaloshinskii-Moriya interaction (DMI). Unprecedented high group velocities (up to 22.5 km/s) are characterized by microwave transmission using all-electrical spin wave spectroscopy. We derive analytically AFM spin-wave dispersion in the presence of the DMI which accounts for our experimental results. The AFM spin waves excited by nanometric coplanar waveguides with large wavevectors enter the exchange regime and follow a quasi-linear dispersion relation. Fitting of experimental data with our theoretical model yields an AFM exchange stiffness length of 1.7 angstrom. Our results provide key insights on AFM spin dynamics and demonstrate high-speed functionality for AFM magnonics. |
| title | Long-distance propagation of high-velocity antiferromagnetic spin waves |
| topic | Materials Science |
| url | https://arxiv.org/abs/2211.10989 |