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Compact Model for Spin–Orbit Magnetic Tunnel Junctions

Electrical control of a magnetic tunnel junction (MTJ) through spin-orbit torques (SOTs) offers opportunities to introduce MTJs into high-performance, low energy applications. SOTs support a high-speed and energy-efficient three terminal MTJ with perpendicular-to-the-plane magnetization (PMTJ). The read path is separated from the write path, enhancing the reliability of the device. SOTs exhibit two coexisting contributions: 1) a damping-like torque and 2) a field-like torque. In this paper, a physics-based compact model for a three terminal PMTJ is presented, which accurately models the magnetic, electrical, and thermal behaviors of a PMTJ controlled through SOTs. The proposed compact model is validated with experimental data, exhibiting reasonable accuracy with an average error of <;5.4%. The integration capability of the proposed compact model with CMOS technology is also demonstrated.