Force-gradient detected nuclear magnetic resonance

Sean R. Garner, Seppe Kuehn, Jahan M. Dawlaty, Neil E. Jenkins, John A. Marohn

Research output: Contribution to journalArticlepeer-review


The nuclear magnetic resonance (NMR) was detected in GaAs by selecting inverting 71Ga spins to create a local force gradients which shifts the mechanical resonance frequency of a nearby magnetic tipped microcantilever. A magnetic moment sensitivity of 7.5×10 -21 J/T which was equal to the Curie law magnetization from 7.1×10 8 71Ga spins, was demonstrated by employing a low spring constant cantilever at 4.4 K and 7 T. It was observed that the magnetic moment sensitivity increases by decreasing the magnet diameter and tip sample separation. The results show that their is a need to spin lock sample magnetization during detection.

Original languageEnglish (US)
Pages (from-to)5091-5093
Number of pages3
JournalApplied Physics Letters
Issue number25
StatePublished - Jun 21 2004
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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