SKM 2023 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 32: Magnetic Imaging Techniques I

MA 32.3: Vortrag

Mittwoch, 29. März 2023, 15:30–15:45, HSZ 401

Quantum calibration of Magnetic Force Microscopy — •Baha Sakar¹, Yan Liu², Sibylle Sievers¹, Fedor Jelezko², and Hans W. Schumacher¹ — ¹Physikalisch Technische Bundesanstalt — ²University of Ulm

Magnetic Force Microscopy (MFM) is a magnetic imaging technique that allows to image magnetic structures with nanometer resolution. However, per se it only delivers qualitative information since the magnetic properties of the tip are not known. The only method of obtaining quantitative information from these qualitative data is through a calibration. In this study we report the quantum calibration of a magnetic force microscope (MFM) by measuring the two-dimensional magnetic stray-field distribution of the MFM tip using a single nitrogen vacancy (NV) center in diamond. From the measured stray-field distribution and the mechanical properties of the cantilever a calibration function is derived allowing to convert MFM images to quantum calibrated stray-field maps. This approach overcomes limitations of prior MFM calibration schemes and allows quantum calibrated nanoscale stray-field measurements in a field range inaccessible to scanning NV magnetometry. Quantum calibrated measurements of a stray-field reference sample allow its use as a transfer standard, opening the road towards fast and easily accessible quantum traceable calibrations of virtually any MFM.