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Miniature atomic magnetometer integrated with flux concentrators

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posted on 2023-06-08, 15:38 authored by Clark GriffithClark Griffith, Ricardo Jimenez-Martinez, Vishal Shah, Svenja Knappe, John Kitching
High 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.

History

Publication status

  • Published

File Version

  • Published version

Journal

Applied Physics Letters

ISSN

0003-6951

Publisher

American Institute of Physics

Issue

2

Volume

94

Page range

023502-1-023502-3

Department affiliated with

  • Mathematics Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2013-09-16

First Open Access (FOA) Date

2013-09-16

First Compliant Deposit (FCD) Date

2013-09-16

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