标题： 基于光子-磁振子同步模式的尖点超灵敏磁强计 显示英文标题

标题： Ultrasensitive Magnetometer based on Cusp Points of the Photon-Magnon Synchronization Mode

摘要： 基于自旋共振的超灵敏磁强计已经取得了显著成就。 然而，这些自旋共振的回旋磁比决定了磁强计对弱磁场的响应度，这些回旋磁比本质上受到粒子（如电子）的Land$\acute{e}$因子的限制，其回旋磁比是一个常数$\gamma_e=2\pi\times28$GHz/T。 在此，我们展示了一种基于光子-磁振子同步模式（PMSMs）的尖点（CP）的超灵敏磁强计。 在CP处，PMSM的回旋磁比增强到$37\gamma_e$，并通过利用PMSM的六阶振荡模式进一步放大到$236\gamma_e$。 此外，PMSM的发射线宽可以降低到0.06 Hz，从而实现了对弱磁场的优异灵敏度。 这些卓越的特性使我们的磁强计有望实现优于传统磁强计的灵敏度。 我们的工作为下一代磁强计提供了一个成本效益高的原型，并可能推动依赖于超灵敏磁场检测的科学研究和技术的发展。 显示英文摘要

摘要： 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 $\gamma_e=2\pi\times28$ 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 $37\gamma_e$ and further amplified to $236\gamma_e$ 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.