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Fig. 7 Scanning electron
micrograph of the dual
branch structure along with
contact pads to inject and
drive the vortex DWs
Fig. 8 Magnetization configurations acquired from micromagnetic simulations. a when a vortex
DW with ACW chirality is injected and driven through branch structure, b when a vortex DW with
CW chirality is injected and driven through branch structure
driving field to move beyond the bifurcation and the magnetization reversal is faster.
However, when the combination of vortex chirality and core polarity is not suited,
the polarity has to switch first before the DW moves further into one of the branches
determined by its chirality making the switching process slow and requiring higher
field. To summarize, the VDW follows selective switching depending on its chirality
irrespective of the polarity of the vortex core.
The chirality dependant selective switching in in-plane nanowires forms the basis
for logic functionality. Phung et al., demonstrated simple two-bit biplexer or demultiplexer that sorts the VDWs into one of the two branches of the Y-shaped branch