Figure 3: Domain wall motion by the Rashba spin-orbit torque.
From: Rashba Torque Driven Domain Wall Motion in Magnetic Helices
Symbols correspond to simulations and solid lines are calculated accordingly to Eq. (8). (a) Schematics of the domain wall dynamics: magnetic moments (red arrows) lie on a conductive wire (grey) (direction of the current j along et is shown with magenta arrow). The Rashba field HR acts along eb. (b,c) Wall velocity as a function of the applied field and damping for ϰ = 0.1 and σ = 0.3. The mobility of the head-to-head (d) and tail-to-tail (e) domain walls in weak fields as a function of the reduced torsion. Dashed and dotted lines show asymptotics (9) for ϰ = 0.1 and ϰ = 0.3, respectively. Under the action of the electric current j domain walls move in the opposite directions starting from the central position.
