Dzyaloshinskii-Moriya interaction in Fe5GeTe2 epitaxial thin films
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arXiv
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| Autores principales: | , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866918143950061568 |
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| author | Sampaio, J. Pascaud, A. Quero, E. Thiaville, A. Polewczyk, V. Marty, A. Bonell, F. Mougin, A. |
| author_facet | Sampaio, J. Pascaud, A. Quero, E. Thiaville, A. Polewczyk, V. Marty, A. Bonell, F. Mougin, A. |
| contents | Van der Waals ferromagnets, such as Fe5GeTe2, offer a promising platform for spintronic devices based on chiral magnetic textures, provided a significant Dzyaloshinskii-Moriya interaction (DMI) can be induced to stabilise the textures. Here, we directly measure DMI in epitaxial Fe5GeTe2 thin films using Brillouin light scattering spectroscopy and observe a consistent DMI (D=0.04 mJ/m2) across various thicknesses. Its weak thickness dependence, combined with the nominally symmetric film interfaces, suggests a bulk origin. Although we do not determine the microscopic mechanism, our findings are compatible with ab initio calculations linking DMI to partial ordering of Fe split sites. Additionally, we find a low magnetic dissipation (alpha<0.02). The observed DMI, which could be further enhanced by optimising the Fe site ordering, combined with low dissipation, makes Fe5GeTe2 a strong candidate for exploring the dynamics of chiral magnetic textures in two-dimensional materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_18689 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Dzyaloshinskii-Moriya interaction in Fe5GeTe2 epitaxial thin films Sampaio, J. Pascaud, A. Quero, E. Thiaville, A. Polewczyk, V. Marty, A. Bonell, F. Mougin, A. Materials Science Van der Waals ferromagnets, such as Fe5GeTe2, offer a promising platform for spintronic devices based on chiral magnetic textures, provided a significant Dzyaloshinskii-Moriya interaction (DMI) can be induced to stabilise the textures. Here, we directly measure DMI in epitaxial Fe5GeTe2 thin films using Brillouin light scattering spectroscopy and observe a consistent DMI (D=0.04 mJ/m2) across various thicknesses. Its weak thickness dependence, combined with the nominally symmetric film interfaces, suggests a bulk origin. Although we do not determine the microscopic mechanism, our findings are compatible with ab initio calculations linking DMI to partial ordering of Fe split sites. Additionally, we find a low magnetic dissipation (alpha<0.02). The observed DMI, which could be further enhanced by optimising the Fe site ordering, combined with low dissipation, makes Fe5GeTe2 a strong candidate for exploring the dynamics of chiral magnetic textures in two-dimensional materials. |
| title | Dzyaloshinskii-Moriya interaction in Fe5GeTe2 epitaxial thin films |
| topic | Materials Science |
| url | https://arxiv.org/abs/2503.18689 |