Wiggling Skyrmions Confined in a Linear Potential Well

Abstract

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 Ds/D0 (<0.3) under perpendicular static magnetic field, where Ds and D0 are skyrmions diameter and nanodots diameter, respectively.

Reciprocal Ferromagnetic Resonant Behaviors Driven by Shear Strains in Isolated Skyrmions

“…Microwave dynamics of skyrmions have attracted intensive attention for potential applications of spintronics, [1][2][3][4] such as spin-torque oscillators, [5,6] microwave sensors, [7] and magnonic crystals. [8][9][10] Nonreciprocal spin wave propagation can be observed in the usual bilayer of Co/FeNi by increasing the thickness of magnetic films.…”