Unidirectional propagation of zero-momentum magnons
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arXiv
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| Hauptverfasser: | , , , , , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866909199222439936 |
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| author | Wojewoda, Ondřej Holobrádek, Jakub Pavelka, Dominik Pribytova, Ekaterina Krčma, Jakub Klíma, Jan Michalička, Jan Lednický, Tomáš Chumak, Andrii V. Urbánek, Michal |
| author_facet | Wojewoda, Ondřej Holobrádek, Jakub Pavelka, Dominik Pribytova, Ekaterina Krčma, Jakub Klíma, Jan Michalička, Jan Lednický, Tomáš Chumak, Andrii V. Urbánek, Michal |
| contents | We report on experimental observation of unidirectional propagation of zero-momentum magnons in synthetic antiferromagnet consisting of strained CoFeB/Ru/CoFeB trilayer. Inherent non-reciprocity of spin waves in synthetic antiferromagnets with uniaxial anisotropy results in smooth and monotonous dispersion relation around Gamma point, where the direction of the phase velocity is reversed, while the group velocity direction is conserved. The experimental observation of this phenomenon by intensity-, phase-, and time-resolved Brillouin light scattering microscopy is corroborated by analytical models and micromagnetic simulations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_10044 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Unidirectional propagation of zero-momentum magnons Wojewoda, Ondřej Holobrádek, Jakub Pavelka, Dominik Pribytova, Ekaterina Krčma, Jakub Klíma, Jan Michalička, Jan Lednický, Tomáš Chumak, Andrii V. Urbánek, Michal Mesoscale and Nanoscale Physics We report on experimental observation of unidirectional propagation of zero-momentum magnons in synthetic antiferromagnet consisting of strained CoFeB/Ru/CoFeB trilayer. Inherent non-reciprocity of spin waves in synthetic antiferromagnets with uniaxial anisotropy results in smooth and monotonous dispersion relation around Gamma point, where the direction of the phase velocity is reversed, while the group velocity direction is conserved. The experimental observation of this phenomenon by intensity-, phase-, and time-resolved Brillouin light scattering microscopy is corroborated by analytical models and micromagnetic simulations. |
| title | Unidirectional propagation of zero-momentum magnons |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2311.10044 |