Fig. 5: Polarizing microscopy textures of DIO at the glycerin substrate.
From: Soliton walls paired by polar surface interactions in a ferroelectric nematic liquid crystal

a N film shows 2π domain splay-bend walls. b, c NF texture of conic-sections with prevailing circular bend; in (b), elliptical defects separate regions between mostly circular bend and mostly uniform P field, while in (c), hyperbolic shapes separate domains with predominantly circular bend. Film thickness 7 µm in (a, c), and 5 µm in (b); \(\hat{{{{{{\bf{n}}}}}}}\) is depicted by white lines.