Full text loading...
Left column: Geometry and dimensions of the model Py nanodisk, and distributions of vortex states with (a) up- and (b) down-core orientations, with the CCW rotation of in-plane around the VC. The color and height display the local and their out-of-plane components, respectively. The middle and right columns display the VC trajectories of the vortex gyrotropic motions during relaxation from a shift of each VC from its initial center position, and during the vortex motion from its initial center position under with and at , respectively. The red and blue colors denote the VC trajectories of the up- and down-core orientations, respectively.
Illustrations of in (a), of in (b), and of in (c), rotating with in the film plane. The right column shows the time variation of the magnitude of the field or current components along the and axes. The sum of and with equal and leads to with the same . The superposition of the orthogonal circular fields results in a linear oscillating field, such that . According to the phase difference between and , the direction of the linear field is determined.
(a) VC trajectories of gyrotropic motions of a VC driven by , , and for different values of as noted. The red and blue colors of the trajectories indicate the motions of the initial up-core orientation and of the reversed VC after the VC switching, respectively. (b) Perspective snapshot images of the temporal evolution of VC reversals at the indicated times.
All of the data are presented in the same way as those in Fig. 3, except for the application of , , and with a current density of .
Article metrics loading...