[(a)–(c)] Schematics of a hard magnetic dot, a soft magnetic ring, and a cylinder composed of the dot and the ring, and [(d)–(f)] magnetic ground states for these elements.
Temporal evolution of the current-driven vortex on the 200-nm-wide cylinder under . The top two rows show the snapshots of the magnetization distribution at indicated times, the bottom left two panels depict the BP injection into [panel (k)] and ejection out of [panel (l)] the cylinder, and the bottom right three panels illustrate the internal field distribution corresponding to the snapshots [(h)–(j)]. The colors and arrows (Ref. 19) encode the out-of-plane and in-plane components of the magnetization/internal field, respectively.
Temporal evolution of the current-driven vortex on the 200-nm-wide cylinder under . [(a)–(g)] Snapshots of the magnetization configuration at indicated times, and the bottom left three panels represent the internal field profiles corresponding to the snapshots [(a)–(c)]. The colors display the out-of-plane magnetization/internal field, while the arrows (Ref. 19) indicate the in-plane magnetization/internal field.
Switching time vs the current density. The points marked with squares, rhombi, and triangles correspond to the -, -, and -mode reversal processes, respectively. The solid lines connecting discrete data points are used only as a guide to the eyes. The inset shows a clean vortex on the 80-nm-wide cylinder formed right after the reversal.
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