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arXiv · 1703.05181

Generation of single skyrmions by picosecond magnetic field pulses

Vegard Flovik·Alireza Qaiumzadeh·Ashis K. Nandy·Changhoon Heo·Theo Rasing
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Abstract

We numerically demonstrate an ultrafast method to create $\textit{single}$ skyrmions in a $\textit{collinear}$ 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.

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Vegard Flovik, Alireza Qaiumzadeh, Ashis K. Nandy, Changhoon Heo, Theo Rasing. 2017-03-15. Generation of single skyrmions by picosecond magnetic field pulses. https://doi.org/10.1103/physrevb.96.140411

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