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MA: Fachverband Magnetismus

MA 24: Magnetic Imaging and Scattering Techniques

MA 24.8: Vortrag

Mittwoch, 13. März 2013, 11:15–11:30, H22

Scanning probe magnetic field imaging with a single spin sensor — •Dominik Schmid-Lorch, Thomas Häberle, 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. Mounted to the tip of 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 the principles of this technique as well as benchmark measurements on magnetic microstructures. Furthermore I compare the performance of different electron spin resonance (ESR) protocols used for magnetic imaging.

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 (2012)