Single femtosecond laser pulse-driven ferromagnetic switching
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , , , , , , , |
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| Natura: | Preprint |
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2025
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| author | Xiao, Chen Zhang, Boyu Zheng, Xiangyu Yao, Yuxuan Wei, Jiaqi Ma, Dinghao Gong, Yuting Xu, Rui Zhang, Xueying He, Yu Cai, Wenlong Huang, Yan Zhu, Daoqian Lu, Shiyang Cao, Kaihua Liu, Hongxi Vallobra, Pierre Lu, Xianyang Zhang, Youguang Koopmans, Bert Zhao, Weisheng |
| author_facet | Xiao, Chen Zhang, Boyu Zheng, Xiangyu Yao, Yuxuan Wei, Jiaqi Ma, Dinghao Gong, Yuting Xu, Rui Zhang, Xueying He, Yu Cai, Wenlong Huang, Yan Zhu, Daoqian Lu, Shiyang Cao, Kaihua Liu, Hongxi Vallobra, Pierre Lu, Xianyang Zhang, Youguang Koopmans, Bert Zhao, Weisheng |
| contents | Light pulses offer a faster, more energy-efficient, and direct route to magnetic bit writing, pointing toward a hybrid memory and computing paradigm based on photon transmission and spin retention. Yet progress remains hindered, as deterministic, single-pulse optical toggle switching has so far been achieved only with ferrimagnetic materials, which require too specific a rare-earth composition and temperature conditions for technological use. In mainstream ferromagnet--central to spintronic memory and storage--such bistable switching is considered fundamentally difficult, as laser-induced heating does not inherently break time-reversal symmetry. Here, we report coherent magnetization switching in ferromagnets, driven by thermal anisotropy torque with single laser pulses. The toggle switching behavior is robust over a broad range of pulse durations, from femtoseconds to picoseconds, a prerequisite for practical applications. Furthermore, the phenomenon exhibits reproducibility in CoFeB/MgO-based magnetic tunnel junctions with a high magnetoresistance exceeding 110%, as well as the scalability down to nanoscales with remarkable energy efficiency (17 fJ per 100-nm-sized bit). These results mark a notable step toward integrating opto-spintronics into next-generation memory and storage technologies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_27288 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Single femtosecond laser pulse-driven ferromagnetic switching Xiao, Chen Zhang, Boyu Zheng, Xiangyu Yao, Yuxuan Wei, Jiaqi Ma, Dinghao Gong, Yuting Xu, Rui Zhang, Xueying He, Yu Cai, Wenlong Huang, Yan Zhu, Daoqian Lu, Shiyang Cao, Kaihua Liu, Hongxi Vallobra, Pierre Lu, Xianyang Zhang, Youguang Koopmans, Bert Zhao, Weisheng Mesoscale and Nanoscale Physics Materials Science Applied Physics Optics Light pulses offer a faster, more energy-efficient, and direct route to magnetic bit writing, pointing toward a hybrid memory and computing paradigm based on photon transmission and spin retention. Yet progress remains hindered, as deterministic, single-pulse optical toggle switching has so far been achieved only with ferrimagnetic materials, which require too specific a rare-earth composition and temperature conditions for technological use. In mainstream ferromagnet--central to spintronic memory and storage--such bistable switching is considered fundamentally difficult, as laser-induced heating does not inherently break time-reversal symmetry. Here, we report coherent magnetization switching in ferromagnets, driven by thermal anisotropy torque with single laser pulses. The toggle switching behavior is robust over a broad range of pulse durations, from femtoseconds to picoseconds, a prerequisite for practical applications. Furthermore, the phenomenon exhibits reproducibility in CoFeB/MgO-based magnetic tunnel junctions with a high magnetoresistance exceeding 110%, as well as the scalability down to nanoscales with remarkable energy efficiency (17 fJ per 100-nm-sized bit). These results mark a notable step toward integrating opto-spintronics into next-generation memory and storage technologies. |
| title | Single femtosecond laser pulse-driven ferromagnetic switching |
| topic | Mesoscale and Nanoscale Physics Materials Science Applied Physics Optics |
| url | https://arxiv.org/abs/2510.27288 |