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MA: Fachverband Magnetismus
MA 37: Magnetic Imaging Techniques
MA 37.3: Vortrag
Donnerstag, 20. März 2025, 15:30–15:45, H16
Planar scanning probe microscopy enables nanoscale vector magnetic field imaging with nitrogen-vacancy centers — •Paul Weinbrenner1,2, Patricia Klar3, Christian Giese3, Luis Flacke4,5, Manuel Müller4,5, Matthias Althammer4,5, Stephan Geprägs4, Rudolf Gross4,5,6, and Friedemann Reinhard1,2,6 — 1Institute for Physics, University of Rostock, Rostock, Germany — 2Department of Life, Light and Matter, University of Rostock, Rostock, Germany — 3Fraunhofer Institute for Applied Solid State Physics, Freiburg, Germany — 4Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Garching, Germany — 5Physics Department, Technical University of Munich, Garching, Germany — 6Munich Center for Quantum Science and Technology, Munich, Germany
We present imaging of vector magnetic fields on the nanoscale using planar scanning probe microscopy with nitrogen-vacancy (NV) centers in diamond as magnetic field sensors. Instead of traditional tip-based scanning probes, we employ an extended bulk diamond doped with NV centers. Despite the probe's large lateral size, it can still be scanned in nanoscale proximity to a planar sample.
We perform repeated measurements with NV centers with different orientations to obtain a direct image of the three-dimensional vector magnetic field of magnetic vortices in a thin-film magnetic heterostructure. Our result opens the possibility of quantum sensing using multiple qubits within the same scanning probe, which can be used for entanglement-enhanced and massively parallel sensing schemes.
Keywords: Quantum sensing; Scanning probe microscopy; Vector magnetometry