Enregistré dans:
| Auteurs principaux: | , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2026
|
| Sujets: | |
| Accès en ligne: | https://arxiv.org/abs/2605.10483 |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866910272320438272 |
|---|---|
| author | Mogunov, Iaroslav Gorshkov, Artyom Rautskii, Mikhail Andryushchenko, Tatyana Kalashnikova, Alexandra |
| author_facet | Mogunov, Iaroslav Gorshkov, Artyom Rautskii, Mikhail Andryushchenko, Tatyana Kalashnikova, Alexandra |
| contents | Magnetic MAX phases are nanolaminated metals that combine ceramic-like thermal and mechanical stability with peculiar magnetic ordering, making them attractive for thin-film optoelectronics and spintronics. However, laser-induced magnetization dynamics in MAX phases remains largely unexplored. Here, we investigate laser-induced ultrafast demagnetization in a 40-nm-thick epitaxial film of the magnetic MAX phase (Cr0.5Mn0.5)2GaC, which magnetically orders below ~220 K, using time-resolved magneto-optical Kerr effect spectroscopy. We reveal, that the demagnetization transients exhibit a two-step type-II demagnetization, common for two-dimensional magnetic systems. The second stage dominates the process and has a characteristic time of approximately 100 ps. Applying the three-temperature model, we extract the electron-lattice, spin-lattice, and electron-spin coupling constants. The reconstructed spin heat capacity exhibits a weak temperature dependence, accounting for only a subtle slowing down of demagnetization at elevated temperatures and fluences. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_10483 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Laser-induced demagnetization in a MAX phase (Cr0.5Mn0.5)2GaC Mogunov, Iaroslav Gorshkov, Artyom Rautskii, Mikhail Andryushchenko, Tatyana Kalashnikova, Alexandra Materials Science Magnetic MAX phases are nanolaminated metals that combine ceramic-like thermal and mechanical stability with peculiar magnetic ordering, making them attractive for thin-film optoelectronics and spintronics. However, laser-induced magnetization dynamics in MAX phases remains largely unexplored. Here, we investigate laser-induced ultrafast demagnetization in a 40-nm-thick epitaxial film of the magnetic MAX phase (Cr0.5Mn0.5)2GaC, which magnetically orders below ~220 K, using time-resolved magneto-optical Kerr effect spectroscopy. We reveal, that the demagnetization transients exhibit a two-step type-II demagnetization, common for two-dimensional magnetic systems. The second stage dominates the process and has a characteristic time of approximately 100 ps. Applying the three-temperature model, we extract the electron-lattice, spin-lattice, and electron-spin coupling constants. The reconstructed spin heat capacity exhibits a weak temperature dependence, accounting for only a subtle slowing down of demagnetization at elevated temperatures and fluences. |
| title | Laser-induced demagnetization in a MAX phase (Cr0.5Mn0.5)2GaC |
| topic | Materials Science |
| url | https://arxiv.org/abs/2605.10483 |