Journal
APPLIED PHYSICS LETTERS
Volume 92, Issue 24, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.2943282
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We describe a scanning device where a single spin is used as an ultrasensitive, nanoscale magnetic field sensor. As this probe spin we consider a single nitrogen-vacancy defect center in a diamond nanocrystal, attached to the tip of the scanning device. Changes in the local field seen by the probe spin are detected by optically monitoring its electron paramagnetic resonance transition. The room-temperature scanning device may be useful for performing nanoscale magnetic resonance imaging and spectroscopy, and for the characterization of magnetic nanostructures down to the single atom level.
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