Fig. 4: Preliminary characterization of the sample utilizing an continuous electron beam.
From: Few-nm tracking of current-driven magnetic vortex orbits using ultrafast Lorentz microscopy

a Lorentz-micrograph of the unexcited sample system acquired under continuous illumination (scale bar: 1 μm). b Orbit-diameter of the vortex gyration as a function of the driving frequency fex. Shaded regions are one-sigma confidence intervals obtained via bootstrapping the fitting routine.