Generation of single skyrmions by picosecond magnetic field pulses
arXiv:1703.05181 · doi:10.1103/PhysRevB.96.140411
Abstract
We numerically demonstrate an ultrafast method to create skyrmions in a ferromagnetic sample by applying a picosecond (effective) magnetic field pulse in the presence of Dzyaloshinskii-Moriya interaction. For small samples the applied magnetic field pulse could be either spatially uniform or nonuniform while for large samples a nonuniform and localized field is more effective. We examine the phase diagram of pulse width and amplitude for the nucleation. Our finding could ultimately be used to design future skyrmion-based devices.
arXiv comment4.5 pages+Supplemental Material
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