Compact pulsed laser deposition system for in-situ polarized neutron reflectometry
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arXiv
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2025
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| author | Kirichuk, Grigorii Grunin, Alexey Dolgoborodov, Artur Prokopovich, Pavel Shvets, Petr Vorobiev, Alexey Devishvilli, Anton Goikhman, Alexandr Maksimova, Ksenia |
| author_facet | Kirichuk, Grigorii Grunin, Alexey Dolgoborodov, Artur Prokopovich, Pavel Shvets, Petr Vorobiev, Alexey Devishvilli, Anton Goikhman, Alexandr Maksimova, Ksenia |
| contents | The development of ferromagnet/heavy metal thin-film structures, such as CoFeB/Mo, with spin-orbit interaction requires advanced methods for their production and study. Polarized neutron reflectometry (PNR) provides unique insights into the evolution of magnetic properties, especially when applied in-situ during the growth process. Pulsed laser deposition (PLD) is a versatile method for producing magnetic thin films, and combining PLD with in-situ PNR measurements offers new possibilities for their investigation. In this work, we developed a compact vacuum chamber integrated into the neutron instrument, enabling step-by-step deposition and in-situ PNR measurements. A multilayer Mo/[CoFeB/Mo]12 structure was grown, and neutron reflectivity curves measured after each cycle revealed the gradual evolution of sample properties. A weak magnetic field response suggested the potential formation of perpendicular magnetic anisotropy (PMA) at CoFeB/Mo interfaces. Additionally, a single CoFeB film was annealed up to 450°C, followed by the deposition of a ~5 Å Mo layer. PNR measurements in magnetic fields of 0.01 T and 0.75 T showed a significant increase in in-plane magnetization, confirming PMA formation. Thus, we demonstrate the first successful operation of a combined PLD and in-situ PNR system, showcasing its capabilities for characterizing single-layer CoFeB and multilayer CoFeB/Mo thin-film structures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_08108 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Compact pulsed laser deposition system for in-situ polarized neutron reflectometry Kirichuk, Grigorii Grunin, Alexey Dolgoborodov, Artur Prokopovich, Pavel Shvets, Petr Vorobiev, Alexey Devishvilli, Anton Goikhman, Alexandr Maksimova, Ksenia Instrumentation and Detectors Mesoscale and Nanoscale Physics Materials Science Nuclear Experiment The development of ferromagnet/heavy metal thin-film structures, such as CoFeB/Mo, with spin-orbit interaction requires advanced methods for their production and study. Polarized neutron reflectometry (PNR) provides unique insights into the evolution of magnetic properties, especially when applied in-situ during the growth process. Pulsed laser deposition (PLD) is a versatile method for producing magnetic thin films, and combining PLD with in-situ PNR measurements offers new possibilities for their investigation. In this work, we developed a compact vacuum chamber integrated into the neutron instrument, enabling step-by-step deposition and in-situ PNR measurements. A multilayer Mo/[CoFeB/Mo]12 structure was grown, and neutron reflectivity curves measured after each cycle revealed the gradual evolution of sample properties. A weak magnetic field response suggested the potential formation of perpendicular magnetic anisotropy (PMA) at CoFeB/Mo interfaces. Additionally, a single CoFeB film was annealed up to 450°C, followed by the deposition of a ~5 Å Mo layer. PNR measurements in magnetic fields of 0.01 T and 0.75 T showed a significant increase in in-plane magnetization, confirming PMA formation. Thus, we demonstrate the first successful operation of a combined PLD and in-situ PNR system, showcasing its capabilities for characterizing single-layer CoFeB and multilayer CoFeB/Mo thin-film structures. |
| title | Compact pulsed laser deposition system for in-situ polarized neutron reflectometry |
| topic | Instrumentation and Detectors Mesoscale and Nanoscale Physics Materials Science Nuclear Experiment |
| url | https://arxiv.org/abs/2501.08108 |