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Chip-scale atomic magnetometer

Appl. Phys. Lett. 85, 6409 (2004); doi:10.1063/1.1839274

Issue Date: 27 December 2004

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Peter D. D. Schwindt, Svenja Knappe, Vishal Shah, Leo Hollberg, and John Kitching
Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80305

Li-Anne Liew and John Moreland
Electromagnetics Division, National Institute of Standards and Technology, Boulder, Colorado 80305
Using the techniques of microelectromechanical systems, we have constructed a small low-power magnetic sensor based on alkali atoms. We use a coherent population trapping resonance to probe the interaction of the atoms' magnetic moment with a magnetic field, and we detect changes in the magnetic flux density with a sensitivity of 50  pT  Hz–1/2 at 10  Hz. The magnetic sensor has a size of 12  mm3 and dissipates 195  mW of power. Further improvements in size, power dissipation, and magnetic field sensitivity are immediately foreseeable, and such a device could provide a hand-held battery-operated magnetometer with an atom shot-noise limited sensitivity of 0.05  pT  Hz–1/2.
History: Received 16 August 2004; accepted 18 October 2004
Permalink: http://link.aip.org/link/?APPLAB/85/6409/1
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KEYWORDS and PACS

Keywords
PACS
  • 07.55.Jg
    Magnetometers for susceptibility, magnetic moment, and magnetization measurements
  • 07.55.Ge
    Magnetometers for magnetic field measurements
  • 85.75.Ss
    Magnetic field sensors using spin polarized transport
  • 85.85.+j
    Micro- and nano-electromechanical systems (MEMS/NEMS) and devices
  • YEAR: 2004

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
Publisher:
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REFERENCES (16)
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