Strain-mediated voltage control of skyrmion transport in nanoracetracks

A voltage-gated scheme for controlling the transport of skyrmions in nanoracetracks is proposed using micromagnetic simulations. The scheme utilizes strain-mediated voltage control of magnetism to effectively modulate local magnetic parameters, including perpendicular magnetic anisotropy, exchange stiffness, the Dzyaloshinskii–Moriya interaction, and saturation magnetization. To understand the effect of voltage-controlled magnetism on skyrmion transport, the dynamic behavior of skyrmions was investigated by varying local magnetic parameters at different driving current densities, thereby revealing the underlying physical mechanism. The results demonstrate that skyrmion annihilation, trapping, blocking, and unblocking can be effectively controlled by coordinating the driving current with the local magnetic parameters. Our scheme offers a practical, low-power electrical control strategy for designing spintronic devices based on skyrmion dynamics.