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J Magn Reson. 2007 Apr;185(2):214-20. Epub 2006 Dec 23.

Detection of NMR signals with a radio-frequency atomic magnetometer.

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1
Department of Physics, Princeton University, Princeton, NJ 08544, USA.

Abstract

We demonstrate detection of proton NMR signals with a radio-frequency (rf) atomic magnetometer tuned to the NMR frequency of 62 kHz. High-frequency operation of the atomic magnetometer makes it relatively insensitive to ambient magnetic field noise. We obtain magnetic field sensitivity of 7 fT/Hz1/2 using only a thin aluminum shield. We also derive an expression for the fundamental sensitivity limit of a surface inductive pick-up coil as a function of frequency and find that an atomic rf magnetometer is intrinsically more sensitive than a coil of comparable size for frequencies below about 50 MHz.

PMID:
17208476
DOI:
10.1016/j.jmr.2006.12.012
[Indexed for MEDLINE]
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