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MA: Fachverband Magnetismus
MA 15: Magnetic measurement methods
MA 15.5: Vortrag
Dienstag, 17. März 2015, 10:30–10:45, H 1012
A hybrid sensor based on nitrogen-vacancy center in diamond and piezomagnetic film for nanoscale probing of stress — •Phani Peddibhotla1, Benjamin Riedmueller2, Liam McGuinness1, Farzaneh Vaghefikia1, Alexander Gerstmayr1, Jianming Cai3, Martin Plenio3, Berndt Koslowski4, Ulrich Herr2, and Fedor Jelezko1 — 1Institute for Quantum Optics, University of Ulm, 89081 Ulm, Germany — 2Institute for Micro- and Nanomaterials, University of Ulm, 89081 Ulm, Germany — 3Institute for Theoretical Physics, University of Ulm, 89081 Ulm, Germany — 4Institute for Solid State Physics, University of Ulm, 89081 Ulm, Germany
We report on the development of a hybrid diamond-piezomagnetic system for the measurement of stress (force) [1]. Our experimental setup comprises of an atomic force microscope (AFM) integrated into a confocal microscope. A thin magnetostrictive film is deposited onto the diamond sample containing nitrogen-vacancy (NV) centers. An AFM cantilever tip is used to apply a local force or stress on the thin film, thereby resulting in a change in the stray magnetic field outside the magnetostrictive material. Optical readout of the spin quantum state of the NV center encodes information about the change in the magnetic field thereby resulting in a transduction of force.
[1] J. Cai et al., Nat. Commun. 5:4065 (2014).