Figure 20.

Schematic showing two left-handed chiral Néel domain walls (also called Dzyaloshinskii domain walls) separating a (red) down-domain from two (blue) up-domains in the top ferromagnetic layer (red, blue, and white arrows show directions of spins in this layer) driven by the Slonczewski-like effective field H_SL (along ±z at each domain wall, as shown) due to charge current j_c (along −x, shown with thick black arrow) and resulting spin Hall effect in the underlying Pt layer, which causes spin current along +z with +y-polarization. This spin current produces oppositely-directed H_SL due to oppositely-directed spins in the two domain walls, causing both domain walls to move with velocity v_DW along +x. [Emori et al., 2013]