Wiggling Skyrmions Confined in a Linear Potential Well

The motion of skyrmions in confined geometry has promising potential for the next generation spintronics in information processing. However, the existence of the edge can affect the trajectory of motion by confining skyrmions to a potential well. Herein, a wiggling behavior of skyrmions in a magnetic nanodot with the average velocity of 6 m s −1 under zero magnetic field is presented, and the coupling of motion and breathing of skyrmions in the absence of spin‐transfer‐torque is found. Such a motion of skyrmions can physically originate from the magnetostatic interaction between the edge and the skyrmions and can also be manipulated by controlling the ratio of D s / D 0 (<0.3) under perpendicular static magnetic field, where D s and D 0 are skyrmions diameter and nanodots diameter, respectively.