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Applied Physics Letters / Volume 97 / Issue 13 / BIOPHYSICS AND BIO-INSPIRED SYSTEMS

Appl. Phys. Lett. 97, 133703 (2010); http://dx.doi.org/10.1063/1.3491548 (3 pages)

Cross-validation of microfabricated atomic magnetometers with superconducting quantum interference devices for biomagnetic applications

Svenja Knappe1, Tilmann H. Sander2, Olaf Kosch2, Frank Wiekhorst2, John Kitching1, and Lutz Trahms2

1NIST, Time and Frequency Division, 325 Broadway, Boulder, Colorado 80305, USA
2Physikalisch-Technische Bundesanstalt, Abbestr. 2-12, 10587 Berlin, Germany

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(Received 8 June 2010; accepted 27 August 2010; published online 28 September 2010)

We compare the performance of a chip-scale atomic magnetometer (CSAM) with that of a superconducting quantum interference device (SQUID) sensor in two biomedical applications. Magnetocardiograms (MCGs) of healthy human subjects were measured simultaneously by a CSAM and a multichannel SQUID sensor in a magnetically shielded room. The typical features of MCGs are resolved by the CSAM, matching the SQUID results. Magnetorelaxometry (MRX) signals of iron nanoparticles were also obtained with the CSAM and compared to similar measurements with a SQUID.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

fibre optic sensors, iron, magnetic particles, magnetic sensors, magnetocardiography, microfabrication, nanoparticles, SQUID magnetometers

PACS

  • 85.25.Dq

    Superconducting quantum interference devices (SQUIDs)

  • 07.55.Jg

    Magnetometers for susceptibility, magnetic moment, and magnetization measurements

  • 07.55.Ge

    Magnetometers for magnetic field measurements

  • 87.85.Va

    Micromachining

  • 42.81.Pa

    Sensors, gyros

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3491548

PUBLICATION DATA

ISSN

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

Publisher

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

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    References

    H. Xia, A. Ben-Amar Baranga, D. Hoffman, and M. V. Romalis, Appl. Phys. Lett. 89, 211104 (2006)APPLAB000089000021211104000001.

    G. Bison, N. Castagna, A. Hofer, P. Knowles, J. L. Schenker, M. Kasprzak, H. Saudan, and A. Weis, Appl. Phys. Lett. 95, 173701 (2009)APPLAB000095000017173701000001.

    P. D. D. Schwindt, S. Knappe, V. Shah, L. Hollberg, J. Kitching, L. -A. Liew, and J. Moreland, Appl. Phys. Lett. 85, 6409 (2004)APPLAB000085000026006409000001.

    J. C. Allred, R. N. Lyman, T. W. Kornack, and M. V. Romalis, Phys. Rev. Lett. 89, 130801 (2002).


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