Fig. 4: Analysis on skyrmion velocities in different multilayer configurations.
a–c Average velocities of passive and active skyrmions as functions of current densities in the configuration illustrated in the insets. The error bars represent the standard derivation. d–f The angle between the average velocities of passive and active skyrmions. In these simulations, there are 5 (81) skyrmions in the passive (active) layer. Other parameters are the same as those used in Fig. 1.
