Broken intrinsic symmetry induced magnon-magnon coupling in synthetic ferrimagnets
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arXiv
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| Autori principali: | , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866911572530561024 |
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| author | Hossain, Mohammad Tomal Chen, Hang Bhatt, Subhash Kaffash, Mojtaba Taghipour Subedi, Mitra M. Xiao, John Q. Sklenar, Joseph Jungfleisch, M. Benjamin |
| author_facet | Hossain, Mohammad Tomal Chen, Hang Bhatt, Subhash Kaffash, Mojtaba Taghipour Subedi, Mitra M. Xiao, John Q. Sklenar, Joseph Jungfleisch, M. Benjamin |
| contents | Synthetic antiferromagnets offer rich magnon energy spectra in which optical and acoustic magnon branches can hybridize. Here, we demonstrate a broken intrinsic symmetry induced coupling of acoustic and optical magnons in a synthetic ferrimagnet consisting of two dissimilar antiferromagnetically interacting ferromagnetic metals. Two distinct magnon modes hybridize at degeneracy points, as indicated by an avoided level-crossing. The avoided level-crossing gap depends on the interlayer exchange interaction between the magnetic layers, which can be controlled by adjusting the non-magnetic interlayer thickness. A large avoided level crossing gap of 3.9 GHz is revealed, exceeding the coupling strength that is typically found in other magnonic hybrid systems based on a coupling of magnons with photons or magnons with phonons. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_06167 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Broken intrinsic symmetry induced magnon-magnon coupling in synthetic ferrimagnets Hossain, Mohammad Tomal Chen, Hang Bhatt, Subhash Kaffash, Mojtaba Taghipour Subedi, Mitra M. Xiao, John Q. Sklenar, Joseph Jungfleisch, M. Benjamin Materials Science Mesoscale and Nanoscale Physics Other Condensed Matter Applied Physics Synthetic antiferromagnets offer rich magnon energy spectra in which optical and acoustic magnon branches can hybridize. Here, we demonstrate a broken intrinsic symmetry induced coupling of acoustic and optical magnons in a synthetic ferrimagnet consisting of two dissimilar antiferromagnetically interacting ferromagnetic metals. Two distinct magnon modes hybridize at degeneracy points, as indicated by an avoided level-crossing. The avoided level-crossing gap depends on the interlayer exchange interaction between the magnetic layers, which can be controlled by adjusting the non-magnetic interlayer thickness. A large avoided level crossing gap of 3.9 GHz is revealed, exceeding the coupling strength that is typically found in other magnonic hybrid systems based on a coupling of magnons with photons or magnons with phonons. |
| title | Broken intrinsic symmetry induced magnon-magnon coupling in synthetic ferrimagnets |
| topic | Materials Science Mesoscale and Nanoscale Physics Other Condensed Matter Applied Physics |
| url | https://arxiv.org/abs/2410.06167 |