Extended Data Fig. 4: Temperature evolution of AFM textures in α-Fe2O3 on cooling.
From: Antiferromagnetic half-skyrmions and bimerons at room temperature
a–f, AFM textures observed in LV-PEEM at the α-Fe2O3–Pt interface upon cooling across TM. This temperature sequence was conducted before the warming run shown in Fig. 1. As expected, the evolution of the AFM textures is reversed, evolving from a predominantly IP state (yellow regions) with (anti)merons (purple dots) at high temperatures (a–c), through the intermediate state (d) to an OOP state (purple domains) separated by ADWs (yellow boundaries) at low temperatures (e, f). Comparing images at nearby temperatures during warming and cooling scans, for instance b with Fig. 1e, or d with Fig. 1c, demonstrates the hysteretic nature of the Morin transition. Grey regions in a–f correspond to the defect on the sample surface. Scale bars are 1 μm. Overall thermal evolution is shown in Supplementary Video 1.
