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Model Py nanostripe of rectangular cross section with indicated dimensions and a TW-type DW positioned at the center, . The in-plane direction is represented by the color-coded direction wheel, along with the streamlines with small arrows. The black box represents the region where plane-wave-like SWs are excited. The inset shows the potential hill of the TW along the longitudinal direction (-axis), which was obtained from the calculation of the total energy as a function of the position of the DW displacement.
Top-view snapshot images of the spatial distribution of the in-plane orientations of local , displaying the temporal evolution of the motion of the TW, driven by propagating SWs of and 13 GHz in (a) and (b), respectively. The vertical white-dotted line denotes the center position, .
(a) Average velocity of TW vs the frequency of driving SWs calculated in the range of 10–45 GHz. Local peaks are marked by different symbols at 14.5, 18.0, 24.0, 27.0, and 32.0 GHz. The red dashed horizontal line corresponds to the velocity of TW caused by the potential hill of the TW without the injection of SWs. (b) Average velocity of the TW driven by and with different values of , 1.0, 4.0, 5.0, and 8.0 kOe. (c) Longitudinal (-axis) displacements of the TW subject to a flow of SWs with frequencies according to the peaks in (a) in a field of . (d) Displacement of the TW for with for sufficiently long time for the TW to reach the right-end edge. The red dashed line corresponds to the right-end edge of the nanostripe.
Dispersion relations of SWs propagating through the nanostripe with a TW in (a) and without it in (b). For the case of (b), the structure was saturated in the direction.
Comparison of the FFT power vs (blue solid line), representing the local modes inherent in the TW and the average velocity of the TW movement vs (pink dotted line), shown in Fig. 3(a).
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