Depth-resolved magnetization dynamics in Fe thin films after ultrafast laser excitation
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866915857389584384 |
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| author | Chardonnet, Valentin Hennes, Marcel Jarrier, Romain Delaunay, Renaud Jaouen, Nicolas Kuhlmann, Marion Leveillé, Cyril Schmising, Clemens von Korff Schick, Daniel Yao, Kelvin Liu, Xuan Chiuzbăian, Gheorghe S. Lüning, Jan Vodungbo, Boris Jal, Emmanuelle |
| author_facet | Chardonnet, Valentin Hennes, Marcel Jarrier, Romain Delaunay, Renaud Jaouen, Nicolas Kuhlmann, Marion Leveillé, Cyril Schmising, Clemens von Korff Schick, Daniel Yao, Kelvin Liu, Xuan Chiuzbăian, Gheorghe S. Lüning, Jan Vodungbo, Boris Jal, Emmanuelle |
| contents | We performed time-resolved x-ray resonant magnetic reflectivity measurements on a laser-excited ferromagnetic Fe thin film to simultaneously probe the transient structural and magnetic depth profiles with nanometer spatial and femtosecond temporal resolution. Our results show that during the first picoseconds after optical excitation, the magnetization of the Fe layer is strongly inhomogeneous, especially in the vicinity of the buried interface. By comparing our experimental results to predictions based on the microscopic three-temperature model and simulations of laser-induced spin-currents, we demonstrate that local and non-local angular momentum transfer phenomena take place simultaneously. After a few picoseconds, the magnetization relaxes back to equilibrium while the total thin film thickness starts oscillating periodically, with a maximum dilation of approximately 1.3% of the entire thin film thickness due to laser-induced stresses. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_11913 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Depth-resolved magnetization dynamics in Fe thin films after ultrafast laser excitation Chardonnet, Valentin Hennes, Marcel Jarrier, Romain Delaunay, Renaud Jaouen, Nicolas Kuhlmann, Marion Leveillé, Cyril Schmising, Clemens von Korff Schick, Daniel Yao, Kelvin Liu, Xuan Chiuzbăian, Gheorghe S. Lüning, Jan Vodungbo, Boris Jal, Emmanuelle Materials Science We performed time-resolved x-ray resonant magnetic reflectivity measurements on a laser-excited ferromagnetic Fe thin film to simultaneously probe the transient structural and magnetic depth profiles with nanometer spatial and femtosecond temporal resolution. Our results show that during the first picoseconds after optical excitation, the magnetization of the Fe layer is strongly inhomogeneous, especially in the vicinity of the buried interface. By comparing our experimental results to predictions based on the microscopic three-temperature model and simulations of laser-induced spin-currents, we demonstrate that local and non-local angular momentum transfer phenomena take place simultaneously. After a few picoseconds, the magnetization relaxes back to equilibrium while the total thin film thickness starts oscillating periodically, with a maximum dilation of approximately 1.3% of the entire thin film thickness due to laser-induced stresses. |
| title | Depth-resolved magnetization dynamics in Fe thin films after ultrafast laser excitation |
| topic | Materials Science |
| url | https://arxiv.org/abs/2603.11913 |