AI 中文总结
该研究开发了室温下毫克级抗磁悬浮铁磁体系统，通过优化几何结构和多通道耗散控制实现100赫兹级频率下23飞特每根号赫兹的磁灵敏度，有望开发出亚飞特级灵敏度磁力计，可用于生物磁场检测及超出标准模型的力搜索。
AI 中文摘要
悬浮机械振荡器是新兴的超灵敏传感器，在应用物理和基础物理领域具有巨大潜力。内部自旋噪声被快速平均的悬浮铁磁体有望实现超高磁灵敏度。本文展示了一种在室温下运行的毫克级抗磁悬浮铁磁体系统，通过优化几何结构和多通道耗散控制，在100赫兹级频率下实现了23飞特每根号赫兹的磁灵敏度。我们预计，经过适度的技术改进，亚飞特级灵敏度的铁磁磁力计将成为可能，该平台为生物磁场检测及超出标准模型的力搜索建立了高性能磁力计。
英文摘要
Levitated mechanical oscillators are emerging ultrasensitive sensors with tremendous potential in both applied and fundamental physics. Levitated ferromagnets, with internal spin noises rapidly averaged, promise ultrahigh magnetic sensitivity. Here, we demonstrate a milligram-scale diamagnetically levitated ferromagnet system operating at room temperature. Through optimized geometry and multi-channel dissipation control, we achieve a magnetic sensitivity of 23~fT$/\sqrt{\text{Hz}}$ at frequency of 100-Hz level. We anticipate that a ferromagnetic magnetometer with subfemtotesla sensitivity is within reach, after modest technical improvements. This platform establishes a high-performance magnetometer for biomagnetic field detection and beyond-standard-model force searches.
Comments9 pages, 4 figures
Journal refPhys. Rev. Applied 25, 024090 (2026)
