Recent progress in domain wall motion in artificially engineered racetracks driven by spinorbit torques

This paper discusses the giant current-induced domain wall velocities in artificially engineering racetracks of magnetic memory devices. It is shown that nano-second long current pulses can move domain walls in synthetic antiferromagnetic racetracks that have nearly no net magnetization and found that the domain walls can be moved even more efficiently and at much higher speeds of up to ~1,000 m/sec compared to similar racetracks in which the sub-layers are coupled ferromagnetically.