Three‐Dimensional Anomalous Hall Sensing Enabled By Spin–Orbit Torque Driven Domain Reconfiguration In Chiral Multilayers

ABSTRACT A three‐dimensional magnetic field sensing concept based on the anomalous Hall effect (AHE) in chiral multilayers driven by spin–orbit torques (SOTs) is presented. In W/CoFeB/MgO stacks that host homochiral stripe and skyrmion states, SOT‐induced domain reorientation and stripe‐to‐bubble transitions are exploited to detect both in‐plane and out‐of‐plane magnetic fields. Finite‐temperature micromagnetic simulations reveal the reversible evolution from stripe domains to skyrmions under applied fields and high current densities. The symmetry of the SOT enables offset‐free in‐plane sensing, while Joule heating‐assisted domain ordering ensures linear out‐of‐plane operation. The device achieves linear ranges of (in‐plane) and (out‐of‐plane), sensitivities up to , and zero‐field offsets below for in‐plane fields. These results introduce SOT‐driven chiral multilayers as a promising platform for vector magnetic field sensing and establish a route toward offset‐free, scalable three‐dimensional Hall sensors based on chiral spin textures.