Fig. 1: Schematic diagram of an elongated-skyrmion-based oscillator and the response of magnetization to a spatially uniform direct current.
From: Elongated skyrmion as spin torque nano-oscillator and magnonic waveguide
a Schematic diagram of the ferromagnetic nanotrack utilized for stabilizing a pinned elongated skyrmion. w is the width of pinning sites. b The spin configuration of a relaxed elongated skyrmion, where colors represent the out-of-plane component of the local unit magnetization mz as indicated by the color bar. c Spatially averaged magnetization 〈mz〉 of the entire film oscillates periodically when the driving current density is 6 MA cm−2. Inset shows the enlarged oscillations in 5.0 ns. d Frequency spectra of this oscillation is obtained from the fast Fourier transform (FFT) of 〈mz〉 in (c).
