Tunable atomic magnetometer for detection of radio-frequency magnetic fields

I. M. Savukov, S. J. Seltzer, M. V. Romalis, K. L. Sauer

Research output: Contribution to journalArticlepeer-review

246 Scopus citations


We describe an alkali-metal magnetometer for detection of weak magnetic fields in the radio-frequency (rf) range. High sensitivity is achieved by tuning the Zeeman resonance of alkali atoms to the rf frequency and partially suppressing spin-exchange collisions in the alkali-metal vapor. We demonstrate magnetic field sensitivity of 2fT/Hz1/2 at a frequency of 99 kHz with a resonance width of 400 Hz. We also derive a simple analytic expression for the fundamental limit on the sensitivity of the rf magnetometer and show that a sensitivity of about 0.01fT/Hz1/2 can be achieved in a practical system with a measurement volume of 200cm3.

Original languageEnglish (US)
Article number063004
JournalPhysical review letters
Issue number6
StatePublished - Aug 5 2005

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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