Dresden 2026 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 64: Surface Magnetism

O 64.1: Hauptvortrag

Mittwoch, 11. März 2026, 15:00–15:30, HSZ/0403

Cantilever based Scanning Force Microscopy: Ultimate Sensitivity and Quantitative Imaging of Nanoscale Spin Textures — •Hans J. Hug — Empa, Ueberlandstrasse 129, 8600 Dübendorf, Switzerland — Department of Physics, University of Basel, Klingelbergstrasse 82, 4056 Basel

Cantilever-based scanning force microscopy operated under vacuum or ultra-high-vacuum (UHV) conditions is a powerful and versatile technique for surface characterization with atomic resolution. Beyond topographic imaging, multimodal and multifrequency approaches enable the simultaneous mapping of Kelvin potential differences and magnetic stray fields with exceptional sensitivity. These advanced methodologies have been applied to quantitatively determine skyrmion diameters in both ferromagnetic and synthetic antiferromagnetic multilayers, revealing skyrmions with diameters down to 25 nm. Furthermore, local tip sample distance control allows MFM imaging on curved substrates, uncovering curvature-induced modifications of the Dzyaloshinskii*Moriya interaction. Finally, we demonstrate the capabilities of UHV multimodal scanning force microscopy by resolving the atomic-scale structure, local Kelvin potential, and magnetic stray fields of NiBr* monolayers grown on Au substrates, highlighting the potential of these techniques for exploring emergent magnetic phenomena in low-dimensional materials.

Keywords: Scanning Force Microscopy; Magnetic Multilayers; Skyrmions; Curvature induced DMI; Transition metal dihalies