ApplPhysLett_94_023502.pdf (548.53 kB)
Miniature atomic magnetometer integrated with flux concentrators
journal contribution
posted on 2023-06-08, 15:38 authored by Clark GriffithClark Griffith, Ricardo Jimenez-Martinez, Vishal Shah, Svenja Knappe, John KitchingHigh permeability magnetic flux concentrators are used to enhance the sensitivity of an atomic magnetometer operating in the spin-exchange relaxation-free regime. The magnetometer uses a millimeter scale 87Rb vapor cell and either mu-metal or Mn–Zn ferrite flux concentrators. The measured sensitivity gives excellent agreement with calculations of thermal noise from the concentrator material. The mu-metal concentrators allow a sensitivity of 50 fT?Hz-1/2, limited by thermal current magnetic noise. The ferrite concentrators are limited by thermal magnetization noise at low frequencies, and reach a sensitivity of 10 fT?Hz-1/2 for frequencies above 125 Hz.
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Publication status
- Published
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- Published version
Journal
Applied Physics LettersISSN
0003-6951Publisher
American Institute of PhysicsExternal DOI
Issue
2Volume
94Page range
023502-1-023502-3Department affiliated with
- Mathematics Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2013-09-16First Open Access (FOA) Date
2013-09-16First Compliant Deposit (FCD) Date
2013-09-16Usage metrics
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