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Applied Physics Letters / Volume 97 / Issue 15 / LASERS, OPTICS, AND OPTOELECTRONICS

Appl. Phys. Lett. 97, 151110 (2010); http://dx.doi.org/10.1063/1.3491215 (3 pages)

Ultrahigh sensitivity magnetic field and magnetization measurements with an atomic magnetometer

H. B. Dang1, A. C. Maloof2, and M. V. Romalis1

1Department of Physics, Princeton University, Princeton, New Jersey 08544, USA
2Department of Geosciences, Princeton University, Princeton, New Jersey 08544, USA

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(Received 1 January 2010; accepted 18 May 2010; published online 14 October 2010)

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/Hz1/2 in a gradiometer arrangement with a measurement volume of 0.45 cm3 and energy resolution per unit bandwidth of 44ℏ. 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/cm3/Hz1/2 and temperatures up to 420°C.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

exchange interactions (electron), magnetisation, magnetometers, optical pumping, remanence, rock magnetism

PACS

  • 07.55.Jg

    Magnetometers for susceptibility, magnetic moment, and magnetization measurements

  • 91.60.Pn

    Magnetic and electrical properties

  • 75.60.Ej

    Magnetization curves, hysteresis, Barkhausen and related effects

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3491215

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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