Terahertz antiferromagnetic dynamics induced by ultrafast spin currents
Fuente:
arXiv
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| Autores principales: | , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866911963596980224 |
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| author | René, Sanjay Levchuk, Artem Abdelsamie, Amr Li, Zixin Dufour, Pauline Chaudron, Arthur Godel, Florian Moussy, Jean-Baptiste Bouzehouane, Karim Fusil, Stéphane Garcia, Vincent Viret, Michel Chauleau, Jean-Yves |
| author_facet | René, Sanjay Levchuk, Artem Abdelsamie, Amr Li, Zixin Dufour, Pauline Chaudron, Arthur Godel, Florian Moussy, Jean-Baptiste Bouzehouane, Karim Fusil, Stéphane Garcia, Vincent Viret, Michel Chauleau, Jean-Yves |
| contents | Insulating antiferromagnets are anticipated as the main protagonists of ultrafast spintronics, with their intrinsic terahertz dynamics and their abililty to transport spin information over long distances. However, direct transfer of spin angular momentum to an antiferromagnetic insulator at picosecond time scales remains to be demonstrated. Here, studying the ultrafast behaviour of ferromagnetic metal/antiferromagnetic insulator bilayers, we evidence the generation of coherent excitations in the antiferromagnet combined with a modulation of the demagnetization behavior of the ferromagnet. This confirms that magnetic information can indeed be propagated into antiferromagnetic spin waves at picosecond timescales, thereby opening an avenue towards ultrafast manipulation of magnetic information. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_14787 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Terahertz antiferromagnetic dynamics induced by ultrafast spin currents René, Sanjay Levchuk, Artem Abdelsamie, Amr Li, Zixin Dufour, Pauline Chaudron, Arthur Godel, Florian Moussy, Jean-Baptiste Bouzehouane, Karim Fusil, Stéphane Garcia, Vincent Viret, Michel Chauleau, Jean-Yves Mesoscale and Nanoscale Physics Materials Science Insulating antiferromagnets are anticipated as the main protagonists of ultrafast spintronics, with their intrinsic terahertz dynamics and their abililty to transport spin information over long distances. However, direct transfer of spin angular momentum to an antiferromagnetic insulator at picosecond time scales remains to be demonstrated. Here, studying the ultrafast behaviour of ferromagnetic metal/antiferromagnetic insulator bilayers, we evidence the generation of coherent excitations in the antiferromagnet combined with a modulation of the demagnetization behavior of the ferromagnet. This confirms that magnetic information can indeed be propagated into antiferromagnetic spin waves at picosecond timescales, thereby opening an avenue towards ultrafast manipulation of magnetic information. |
| title | Terahertz antiferromagnetic dynamics induced by ultrafast spin currents |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2407.14787 |