Fig. 1: Sample schematics.

a Schematic of an STNO device with stack information. Both the free (Co/Ni multilayer) and the reference layer (Co/Pd multilayer) have strong perpendicular magnetic anisotropy along the \(\hat{{{{{{{{\bf{z}}}}}}}}}\)-axis. The applied current runs through the nanocontact (NC) down to the base electrode, where it flows laterally before it continues back up to two top electrodes located about 5 μm to the left and right of the NC (see Fig. S1 in the Supplementary Materials). b Single droplet nucleated in the free layer. c Droplet soliton pair residing in both the free and reference layer. Dashed circles indicate the NC areas.