Dresden 2011 – scientific programme
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O: Fachverband Oberflächenphysik
O 35: Poster Session I (Scanning probe methods)
O 35.7: Poster
Tuesday, March 15, 2011, 18:30–22:00, P3
Development of a nanoscale scanning-probe magnetometer with single spin sensitivity — •Eike Oliver Schäfer-Nolte1,2, Friedemann Reinhard2, Markus Ternes1, Fedor Jelezko2, Jörg Wrachtrup2, and Klaus Kern1 — 1Max-Planck Institut für Festkörperforschung, Stuttgart, Germany — 23. Physikalisches Institut, Universität Stuttgart, Germany
The detection of weak magnetic fields at small length scales is a long-standing challenge in physics. We report on our work constructing a scanning-probe magnetometer capable to measure small magnetic fields and single spins with sub-nanometer spatial resolution.
This experiment employs a nitrogen-vacancy (NV) center in diamond as an ultrasensitive magnetic field sensor. Its spin state can be monitored using optically detected magnetic resonance [1]. Attaching a nanodiamond containing this "probe spin" to the tip of an atomic force microscope (AFM) working in ultra-high vacuum at low temperature allows studies of magnetic fields at the atomic scale [2,3]. The details of the experimental setup are presented along with experimental data characterizing the individual components.
[1] F. Jelezko et al., phys. stat. sol. (a) 203, No 13 (2006)
[2] G. Balasubramanian et al., nature Vol 455 (2008)
[3] J.M. Taylor et al., nature physics Vol 4 (2008)