Ultrahigh sensitivity magnetic field and magnetization measurements with an atomic magnetometer
Ultrahigh sensitivity magnetic field and magnetization measurements with an atomic magnetometer
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DOI：
10.1063/1.3491215
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发表时间：
2010-10-11
影响因子：
4
通讯作者：
Romalis, M. V.
中科院分区：
文献类型：
--
作者：
Dang, H. B.;Maloof, A. C.;Romalis, M. V.
我们描述了一个超灵敏的原子磁力计的基础上，光泵钾原子的自旋交换弛豫自由制度。我们证明了磁场灵敏度为160 aT/Hz（1/2）的梯度计安排与测量体积为0.45 cm（3）和能量分辨率每单位带宽为44小时。作为此类磁力计实现的应用的一个示例，我们描述了作为温度函数的弱残岩磁化强度的测量，灵敏度为10（-10）emu/cm（3）/Hz（1/2）量级，温度高达420摄氏度。(C)2010年美国物理学会。[doi：10.1063/1.3491215]
We describe an ultrasensitive atomic magnetometer based on optically pumped potassium atoms operating in a spin-exchange relaxation free regime. We demonstrate magnetic field sensitivity of 160 aT/Hz(1/2) in a gradiometer arrangement with a measurement volume of 0.45 cm(3) and energy resolution per unit bandwidth of 44h. As an example of an application enabled by such a magnetometer, we describe measurements of weak remnant rock magnetization as a function of temperature with a sensitivity on the order of 10(-10) emu/cm(3)/Hz(1/2) and temperatures up to 420 degrees C. (C) 2010 American Institute of Physics. [doi:10.1063/1.3491215]