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MA: Fachverband Magnetismus
MA 6: Magnetic Imaging Techniques I
MA 6.2: Vortrag
Montag, 9. März 2026, 09:45–10:00, POT/0361
Probing nanoscale magnetic phenomena with cryogenic scanning NV magnetometry — •Mirko Bacani1, Clemens Schäfermeier1, Ankit Sharma1, Christopher Kelvin von Grundherr1, Dieter Andres1, Khaled Karrai1, Gabriel Puebla-Hellmann2, Jan Rhensius2, Andrea Morales2, and Florian Otto1 — 1attocube systems GmbH , Haar, Germany — 2QZabre AG, Zurich, Switzerland
Emerging technologies increasingly rely on precise control and understanding of magnetic phenomena at the nanoscale and cryogenic temperatures. NV magnetometry offers a unique approach, combining quantum sensing with scanning probe precision to achieve magnetic field mapping at resolutions and sensitivities beyond conventional limits. We present cw-ODMR imaging of materials hosting emergent quantum and topological magnetic phenomena, including Abrikosov vortices in BSCCO and YBCO, interlayer domain textures in twisted bilayer CrSBr, magnetic domains in skyrmions-hosting Ir/Fe/Co/Pt multilayers, and meronic spin textures in synthetic antiferromagnets.
The imaging was performed by the cryogenic scanning NV magnetometer integrated into a closed-cycle cryostat with turnkey operation from 2-300 K. The system reaches the sensitivity of 3 uT/sqrt(Hz) with automated ODMR for quantitative stray-field mapping. These results exemplify the versatility of cryogenic NV magnetometry as a tool for probing superconductivity, correlated magnetism, and emergent spin textures in quantum materials.
Keywords: quantum sensing; NV magnetometry; cryogenics; superconductivity; scanning