Extended Data Fig. 3: Temperature evolution of AFM textures in α-Fe1.97Rh0.03O3 on warming.
From: Antiferromagnetic half-skyrmions and bimerons at room temperature
a, Magnetometry data of α-Fe1.97Rh0.03O3 exhibiting the Morin transition at room temperature. Insets show the anisotropy reversal in the magnetic sublattices between OOP and IP orientations. b–g, Evolution of the AFM textures as observed in LV-PEEM, at the α-Fe1.97Rh0.03O3–Pt interface, while warming across TM. Below TM (b–d), the principal AFM features are OOP AFM domains (purple domains) separated by ADWs (yellow boundaries). Upon warming, ADWs widen and merge with IP domains nucleating nearby (d, e), until the IP domains themselves become the matrix (f, g), above TM. As observed in pure α-Fe2O3 (Figs. 1, 2), the OOP bubbles (purple dots) get trapped in the IP matrix (yellow regions) when found at topologically non-trivial merger points of six-fold IP domains, resulting in the formation of merons and antimerons at room temperature. The grey region in (b–g) corresponds to the defect on the sample surface. Scale bars are 1 μm.
