Current‐Driven Chirality Detection of Magnetic Textures in Cylindrical Nanowires

Domain wall (DW) movement in cylindrical magnetic nanowires has been extensively studied for applications in storage devices, sensors, and neuromorphic computing. The cylindrical wire geometry favors magnetization curling at the ends, nucleating vortex magnetic textures, which propagate as Bloch‐point DWs. Applying current pulses generates azimuthal Oersted fields that interact with the DW, promoting its propagation. Imperfections along the wire can pin the DW or nucleate additional vortex textures. Here we measured an individual Ni nanowire (diameter nm and length ) featuring thick non‐magnetic Au segments (length nm) to localize vortex magnetic textures upon field switching. Using current‐assisted anisotropic magnetoresistance measurements, we successfully detect vortex chirality near each Au segment and induce selective magnetic reversal below the propagation field. In the investigated nanowire, this method enabled the selective segment reversal at a low current density of A/, minimizing Joule heating. Furthermore, it offers a simple, cost‐effective, and non‐invasive approach for tracking vortex chirality along nanowires.