Figure 1

Magnetic vortex dynamics in a thin circular FeNi nanodot. Vortex core steady-state orbit radius u₀(J) in the circular FeNi nanodot of thickness L = 7 nm and radius R = 100 nm vs. current J perpendicular to the dot plane. Solid black lines are calculations by Equation 7; red circles mark the simulated points. Inset: sketch of the cylindrical vortex state dot with the core position X and used system of coordinates.