Ultrasensitive Magnetometer based on Cusp Points of the Photon-Magnon Synchronization Mode
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arXiv
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| Format: | Preprint |
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2025
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| author | Mi, Xinlin Rao, Jinwei Yan, Lijun Wang, Xudong Lyu, Bingbing Yao, Bimu Yan, Shishen Bai, Lihui |
| author_facet | Mi, Xinlin Rao, Jinwei Yan, Lijun Wang, Xudong Lyu, Bingbing Yao, Bimu Yan, Shishen Bai, Lihui |
| contents | Ultrasensitive magnetometers based on spin resonances have led to remarkable achievements. However, the gyromagnetic ratios of these spin resonances that determine the responsivity of magnetometers to weak magnetic fields are inherently constrained by the Land$\acute{e}$ g-factor of particles, such as the electron, with a constant gyromagnetic ratio of $γ_e=2π\times28$ GHz/T. Here, we demonstrate an ultrasensitive magnetometer based on the cusp point (CP) of photon-magnon synchronization modes (PMSMs). The PMSM's gyromagnetic ratio at the CP is enhanced to $37γ_e$ and further amplified to $236γ_e$ by utilizing the sixth-order oscillating mode of the PMSM. Moreover, the emission linewidth of the PMSM can be reduced to 0.06 Hz, resulting in excellent sensitivity to weak magnetic fields. These outstanding properties position our magnetometer to potentially achieve superior sensitivity to conventional magnetometers. Our work introduces a cost-effective prototype for the next generation of magnetometry, and may advance scientific research and technologies that rely on ultrasensitive magnetic field detection. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_08032 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Ultrasensitive Magnetometer based on Cusp Points of the Photon-Magnon Synchronization Mode Mi, Xinlin Rao, Jinwei Yan, Lijun Wang, Xudong Lyu, Bingbing Yao, Bimu Yan, Shishen Bai, Lihui Mesoscale and Nanoscale Physics Applied Physics Ultrasensitive magnetometers based on spin resonances have led to remarkable achievements. However, the gyromagnetic ratios of these spin resonances that determine the responsivity of magnetometers to weak magnetic fields are inherently constrained by the Land$\acute{e}$ g-factor of particles, such as the electron, with a constant gyromagnetic ratio of $γ_e=2π\times28$ GHz/T. Here, we demonstrate an ultrasensitive magnetometer based on the cusp point (CP) of photon-magnon synchronization modes (PMSMs). The PMSM's gyromagnetic ratio at the CP is enhanced to $37γ_e$ and further amplified to $236γ_e$ by utilizing the sixth-order oscillating mode of the PMSM. Moreover, the emission linewidth of the PMSM can be reduced to 0.06 Hz, resulting in excellent sensitivity to weak magnetic fields. These outstanding properties position our magnetometer to potentially achieve superior sensitivity to conventional magnetometers. Our work introduces a cost-effective prototype for the next generation of magnetometry, and may advance scientific research and technologies that rely on ultrasensitive magnetic field detection. |
| title | Ultrasensitive Magnetometer based on Cusp Points of the Photon-Magnon Synchronization Mode |
| topic | Mesoscale and Nanoscale Physics Applied Physics |
| url | https://arxiv.org/abs/2507.08032 |