Regensburg 2013 – scientific programme

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MA: Fachverband Magnetismus

MA 16: Poster I

MA 16.77: Poster

Tuesday, March 12, 2013, 10:30–13:30, Poster D

A next-generation room-temperature AFM setup with optical access for magnetic imaging using a single spin sensor — •Thomas Häberle, Dominik Schmid-Lorch, Friedemann Reinhard, and Jörg Wrachtrup — 3. Physikalisches Institut und Forschungszentrum SCoPE, Universität Stuttgart, Germany

We work on a novel magnetic field sensor that is based on the nitrogen-vacancy (NV)-color center in diamond. The electron spin structure of the NV-center allows us to perform optically detected electron spin resonance (ESR) measurements, which can be made sensitive to the ambient magnetic field. Combined with an AFM, these atomic-sized color centers promise an even higher spatial resolution than the MFM [1] while reducing back-action on the sample to a minimum.

I present first results as well as the methods and instrumental setup used to conduct these measurements. The core component of the setup is a next-generation commercial AFM, featuring additional optical access. This allows readout of the spin state via confocal microscopy with simultaneous imaging and manipulation of the sample on a sub-nanometer scale with the AFM.

Applications of this technique are detection and imaging of single electron spins [2] and small nuclear spin ensembles.

[1]G. Balasubramanian et al., Nature Vol 455, 648-651 (2008)

[2]M.S. Grinolds et al., arXiv:1209.0203v1 [cond-mat.mes-hall] (2012)