Figure 4
Color mapping of equilibrium spin configurations for various DMI values (exponentially decaying DMI) at 300 K for dGd-Co > 0 and dGd-Co < 0 in (a) 5 nm, (b) 10 nm, and (c) 15 nm GdCo. Out-of-plane components of reduced magnetizations (mz) are mapped in the x-y plane using the color bar shown in (c). Ultrasmall skyrmions are revealed in 10 nm and 15 nm GdCo samples.
