Controlling skyrmion Hall effect dynamics in constricted ferromagnetic nanowires

Magnetic skyrmions, nanoscale topologically protected spin textures, hold immense potential for next-generation data storage and logic devices, particularly in racetrack memory applications due to their stability and low energy requirements. However, challenges such as the skyrmion Hall effect (SkHE) and non-uniform spacing between skyrmions hinder their implementation. A novel approach using constricted nanowires to mitigate SkHE and improve skyrmion control is proposed. Through advanced micromagnetic simulations, we examine the dynamics of a Ne<acute accent>el skyrmion under spin-transfer torque and explore the influence of constriction geometry on skyrmion motion. Our findings demonstrate that strategic use of notched regions effectively controls skyrmion trajectory, enhances velocity, and regulates skyrmion spacing. This presents a promising solution for reliable and efficient skyrmion-based spintronic devices.