Acceleration and Deceleration Behavior of Skyrmion Controlled by Curvature Gradient in Elliptical-Ring Track

The potential of skyrmions as information carriers in spintronic devices has garnered significant attention. In this paper, the study investigates the current driven movement behavior of skyrmions in elliptical-ring tracks (ERTs). The findings suggest that the curvature gradient of ERTs can either increase or decrease skyrmion velocity. The increase in velocity aids in transmitting skyrmions, while the decrease in velocity helps in intercepting them. Based on the transmission and interception of skyrmion controlled by the curvature gradient of the ERT, the study has designed diode, logic NOT, AND, and OR gates. The feasibility and robustness of these devices are demonstrated through micromagnetic simulations. The research provides valuable insights and recommendations for designing skyrmion-based devices with curved geometries.