Nonmonotonic effects of perpendicular magnetic anisotropy on current-driven vortex wall motions in magnetic nanostripes
Su Yuan-Chang†, Lei Hai-Yang, Hu Jing-Guo‡
       
(a) Horizontal displacements d x of the VW and (b) vertical displacements d y of the vortex core versus simulation time t with different PMA. The insets of panels (a) and (b) show the time-averaged velocities (within the range of 0–1.3 ns) of the horizontal motion and the vertical motion as a function of K z , respectively. Parameter u = 75.4 m/s.