Regensburg 2025 – scientific programme
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MA: Fachverband Magnetismus
MA 19: Magnetic Imaging and Sensors
MA 19.3: Talk
Tuesday, March 18, 2025, 14:30–14:45, H20
Development of an Ultra High Vacuum and Low Temperature Scanning NV Magnetometer — •Sandip Maity1, Ricardo Javier Peña Román1, Dinesh Pinto1,3, Klaus Kern1,3, and Aparajita Singha2,1 — 1Max Planck Institute for Solid State Research, Stuttgart, German — 2Technische Universität Dresden, Dresden, Germany — 3Institut de Physique, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
The nanoscale spatial resolution and calibration-free quantifiable magnetic field measurement capabilities of nitrogen-vacancy (NV) centers have enabled us to investigate the properties of magnetic spin textures with high magnetic sensitivity through scanning probe microscopy across a wide range of temperatures and pressure. I will be discussing the development of a scanning probe magnetometer capable of imaging magnetic nanostructures under ultra-high vacuum and low temperature. Moreover, we have integrated commercial NV tips with a home-built tip holder equipped with an AFM amplifier and microwave excitation on the tip (not on the sample), allowing us to have a magnetic image of any sample region without restriction. To exploit the quantifying nature of NV magnetometry using Optically Detected Magnetic Resonance, a coherent microwave (MW) delivery to the probe is mandatory. I will also discuss different means of delivering MW to the NV probes through different designs of the tip holders and how effective they are in coherently manipulating the NV spin states.
Keywords: NV Center; Magnetic Imaging; LT and UHV