  We propose that the non-linear radio-frequency dynamics and nanoscale size of
topological magnetic structures associated to their well-defined internal modes
advocate for their use as in-materio scalable frequency multipliers for
spintronic systems. Frequency multipliers allow for frequency conversion
between input and output frequencies, and thereby significantly increase the
range of controllably accessible frequencies. In particular, we explore the
excitation of eigenmodes of topological magnetic textures by fractions of the
corresponding eigenfrequencies. We show via micromagnetic simulations that
low-frequency perturbations to the system can efficiently excite bounded modes
with a higher amplitude. For example, we excited the eigenmodes of isolated
ferromagnetic skyrmions by applying half, a third and a quarter of the
corresponding eigenfrequency. We predict that the frequency multiplication via
magnetic structures is a general phenomenon which is independent of the
particular properties of the magnetic texture, and works also for magnetic
vortices, droplets and other topological textures.
