Figure 4
From: Direct observation of deterministic domain wall trajectory in magnetic network structures
Domain wall evolution at the bifurcation.
Simulations depicting DW evolution at the bifurcation for symmetric and asymmetric PD structure. An edge defect of topological charge −1/2 exists intrinsically at the bifurcation also referred to as vertex, the position of the topological charge at the vertex is slightly displaced in the lower branch for PD structure (VA) as compared to the symmetric structure (VS). As field is increased the edge defect at the vertex transforms to a vortex state. For the case of symmetric structure the vortex annihilates and the DW is nucleated in the opposite branch, the DW propagates in the branch which is opposite to topological edge defect of −1/2 (denoted as point C). For the PD structure, the VDW de-pins and moves along the upper branch, the path with less potential barrier. The DW moves in the branch opposite to topological edge defect of −1/2 (denoted as point D).
