Ultrafast imprinting of topologically protected magnetic textures via pulsed electrons
  Short electron pulses are demonstrated to trigger and control magnetic
excitations, even at low electron current densities.
We show that the tangential magnetic field surrounding a picosecond electron
pulse can imprint topologically protected magnetic textures such as skyrmions
in a sample with a residual Dzyaloshinskii-Moriya spin-orbital coupling.
Characteristics of the created excitations such as the topological charge can
be steered via the duration and the strength of the electron pulses. The study
points to a possible way for a spatio-temporally controlled generation of
skyrmionic excitations.
