Influence of interlayer exchange coupling on ultrafast laser-induced magnetization reversal in ferromagnetic spin valves
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arXiv
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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866909555501301760 |
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| author | Igarashi, Junta Guen, Yann Le Hohlfeld, Julius Mangin, Stephane Gorchon, Jon Hehn, Michel Malinowski, Gregory |
| author_facet | Igarashi, Junta Guen, Yann Le Hohlfeld, Julius Mangin, Stephane Gorchon, Jon Hehn, Michel Malinowski, Gregory |
| contents | In this study, we explore the influence of interlayer exchange coupling on magnetization reversal triggered by femtosecond laser pulses in ferromagnetic spin valves. Our experiments, focused on femtosecond laser-induced magnetization reversal, methodically vary the thickness of the copper (Cu) spacer layer. We identify a critical Cu thickness threshold at 2.32 nm. Above this threshold, a stable reversed magnetic domain is consistently generated upon exposure to a single laser pulse. Conversely, with a Cu spacer thinner than 2.32 nm, the observed magnetization reversal from parallel (P) to anti-parallel (AP) states occurs only under continuous laser irradiation. Once the laser is stopped, the magnetic configuration relaxes back to its initial P state, influenced by ferromagnetic exchange coupling. This research enhances our understanding of the mechanisms that drive optically induced ultrafast magnetization reversal in ferromagnetic spin valves. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_12753 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Influence of interlayer exchange coupling on ultrafast laser-induced magnetization reversal in ferromagnetic spin valves Igarashi, Junta Guen, Yann Le Hohlfeld, Julius Mangin, Stephane Gorchon, Jon Hehn, Michel Malinowski, Gregory Materials Science Mesoscale and Nanoscale Physics In this study, we explore the influence of interlayer exchange coupling on magnetization reversal triggered by femtosecond laser pulses in ferromagnetic spin valves. Our experiments, focused on femtosecond laser-induced magnetization reversal, methodically vary the thickness of the copper (Cu) spacer layer. We identify a critical Cu thickness threshold at 2.32 nm. Above this threshold, a stable reversed magnetic domain is consistently generated upon exposure to a single laser pulse. Conversely, with a Cu spacer thinner than 2.32 nm, the observed magnetization reversal from parallel (P) to anti-parallel (AP) states occurs only under continuous laser irradiation. Once the laser is stopped, the magnetic configuration relaxes back to its initial P state, influenced by ferromagnetic exchange coupling. This research enhances our understanding of the mechanisms that drive optically induced ultrafast magnetization reversal in ferromagnetic spin valves. |
| title | Influence of interlayer exchange coupling on ultrafast laser-induced magnetization reversal in ferromagnetic spin valves |
| topic | Materials Science Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2311.12753 |