Extended Data Fig. 6: Skyrmion nanodomains with different lateral sizes.
From: Skyrmion nanodomains in ferroelectric–antiferroelectric solid solutions

a, The HAADF images with overlay of polar displacement vectors, in which the skyrmionic textures with lateral size of ~3.0 and ~8.0 nm are observed. b, Vector PFM characterizations of the skyrmion nanodomains. The smallest skyrmion nanodomains observed by the PFM are ~15 nm in lateral. For skyrmions smaller than 15 nm, clear dipole textures cannot be detected because of the limitation of the tip diameter (see Methods for the details of tips).