Fig. 4: Domain wall (DW) avalanches and recombination.
From: Walker-like domain wall breakdown in layered antiferromagnets driven by staggered spin–orbit fields
a Schematic illustration of the excitation protocol and spatiotemporal evolution of the winding number density, w. Each of the pulses are characterised by a ramp and fall times of 5 ps and constant spin–orbit field (Hso) values of 100 mT and 0 T for 50 ps. Multiple domain wall avalanches can be observed at each Hso which translates into an increase in the number of DWs. b Time evolution of the x-component of the magnetisation, mx, which illustrates the recombination events between DWs with opposite winding number occurring predominantly when Hso is turned off. c Comparison of the recombination time, tr, extracted from the simulation and analytically from Eq. (3) as a function of the distance travelled by each DW with opposite winding number before recombination event occurs corresponding to panel a.
