Abstract
Proper estimation of the efficiency of spin-orbit torque (SOT) in ferromagnetic multilayers with small coercive force is not trivial, yet is in high demand for implementing current-induced magnetization reversal in memory cells. This study proposes a method for estimating the effective field of SOT based on analyzing the position of a domain wall displaced parallel to the current, combined with the spatial distribution of the Oersted field. This advanced method is more reliable than the extensively used second-harmonic and current-induced-magnetization-curve techniques, for a wide spectrum of materials, including Pt-based systems.
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