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首页> 外文期刊>Optics Letters >High sensitivity magnetometer using nanocomposite polymers with large magneto-optic response
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High sensitivity magnetometer using nanocomposite polymers with large magneto-optic response

机译：具有大磁光响应的纳米复合聚合物的高灵敏度磁力计

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Miniaturized magnetic field sensors are increasingly used in various applications, such as geophysical exploration for minerals and oil, volcanology, earthquake studies, and biomedical imaging. Existing magnetometers lack either the spatial or the temporal resolution or are restricted to costly shielded labs and cannot operate in an unshielded environment. Increasing spatio-temporal resolution would allow for real-time measurements of magnetic fluctuations with high resolution. Here we report on a new nanocomposite-based system for miniaturized magnetic field sensing. The sensor is based on Dy3+-doped magnetite and cobalt ferrite nanoparticles dispersed in a polymer matrix. Operation is feasible at room temperature and in an unshielded environment. A compact fiber-optic interferometer is used as the detection mechanism with 20 fT/root Hz sensitivity. We investigated the magnetic field response of the sensor and demonstrated the measurement of the human heartbeat as a potential application. (C) 2018 Optical Society of America
机译：小型化磁场传感器越来越多地用于各种应用，例如用于矿物质和油，火山学，地震研究和生物医学成像的地球物理探索。现有磁力计缺少空间或时间分辨率，或者仅限于昂贵的屏蔽实验室，不能在非屏蔽的环境中运行。增加的时空分辨率将允许具有高分辨率的磁波动的实时测量。在这里，我们报告了一种新型纳米复合材料的小型磁场感测系统。该传感器基于DY3 +掺杂的磁铁矿和分散在聚合物基质中的钴铁氧体纳米颗粒。操作在室温和非屏蔽环境中可行。紧凑型光纤干涉仪用作具有20英尺/根Hz灵敏度的检测机构。我们研究了传感器的磁场响应，并证明了人类心跳作为潜在应用的测量。 （c）2018年光学学会

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