Fig. 3: Magnetic force microscopy (MFM) imaging and topological Hall effect.
From: An atomically tailored chiral magnet with small skyrmions at room temperature
Room temperature MFM images of a 108 nm Fe1.2Ge film, with out-of-plane magnetic fields of a 0 mT, b 50 mT, c 150 mT, d 175 mT, e 200 mT, f 300 mT. The shift in the frequency of the oscillating cantilever (Δf) is proportional to the magnetic force gradient. Topological Hall resistivity for g Fe-rich Fe1.2Ge and h FeGe. Red dashed circles identify skyrmions. MFM images without circles are provided in Figure S8 of Supplementary Note 2.
