Fig. 5: Modelling of the SK distortion in presence of the chiral damping.
From: Effect of Chiral Damping on the dynamics of chiral domain walls and skyrmions
a CIDM plotted as a function of the ratio of HDL/HDMI. The dotted line approximately separates the linear variation regime from the plateau. Here, HDMI = 0.2 T and HDL = 2·HFL. The values chosen for these simulations are close to the optimal values and very importantly, they are realistic (typical for Pt/Co/AlOx systems). b angular dependence of the velocity in the linear regime c. angular dependence of the velocity in the saturation regime. (black: α1 = 0.4; blue: α1 = 0.4, α2 = 0.2; red: α1 = 0.4, α2 = −0.2) d. Skyrmion position as a function of time for different current and damping values. e Superposed images of the out-of-plane component of the micromagnetic structure at different moments of time during the simulation. On each image, the SK on the left corresponds to the initial state. At low current density (top row) the SK structure remains intact during the displacement. Chiral damping only influences the trajectory. At larger currents, at first, the SK undergoes a slight distortion, which in the case of α1 = 0.2 and αµ2 = −0.05, leads to its instability and the SK explodes. Here the electric current is applied at 45° with respect to the stripe major axis.
