Ultrahigh sensitivity magnetic field and magnetization measurements with an atomic magnetometer

被引：737

作者：

Dang, H. B. ^{[1
]}

Maloof, A. C. ^{[2
]}

Romalis, M. V. ^{[1
]}

机构：

[1] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

[2] Princeton Univ, Dept Geosci, Princeton, NJ 08544 USA

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 15期

关键词：

ELECTRONICS; NOISE; GAS;

D O I：

10.1063/1.3491215

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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]

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页数：3

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