Fig. 6: Comparison of ensemble velocity evolution with the number of skyrmions in clean and granular nanotracks.
From: Skyrmion motion and partitioning of domain wall velocity driven by repulsive interactions
a Ensemble velocity versus the number of skyrmions Ns for the granular nanotrack at two various field strengths (H = 300 Oe and 600 Oe). For each field strength, three different realizations (Rlzts.1‒3) of grain distribution are considered. Black triangles are the average value of v(1), v(2), and v(3), the ensemble velocities in the three different realizations of grain distribution. b Ensemble velocity versus Ns for the clean (∆K = 0, where ∆K represents the deviation of perpendicular magnetic anisotropy strength from its average value Ku0) and granular (∆K = 2%Ku0) nanotracks. c Difference of the ensemble velocities in the clean and granular nanotracks (defined as ∆v = v(clean) – v(granular)) against Ns, which are derived from panel b. Lines are guides to eyes. Ku0 = 0.8 MJm−3 and Dzyaloshinskii-Moriya interaction strength D = 3.5 mJm−2.
