Journal
JOURNAL OF MAGNETIC RESONANCE
Volume 185, Issue 2, Pages 214-220Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jmr.2006.12.012
Keywords
NMR; atomic magnetometer; radio-frequency; pick-up coil; sensitivity
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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/Hz(1/2) 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. (C) 2006 Elsevier Inc. All rights reserved.
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