  Topologically protected whirling magnetic textures could emerge as data
carriers in next-generation post-Moore computing. Such textures are abundantly
observed in ferromagnets (FMs); however, their antiferromagnetic (AFM)
counterparts are expected to be even more relevant for device applications, as
they promise ultra-fast, deflection-free dynamics whilst being robust against
external fields. Unfortunately, they have remained elusive, hence identifying
materials hosting such textures is key to developing this technology. Here, we
present comprehensive micromagnetic and analytical models investigating
topological textures in the broad material class of A-type antiferromagnets,
specifically focusing on the prototypical case of $\alpha \text{-Fe}_2
\text{O}_3$,an emerging candidate for AFM spintronics. By exploiting a symmetry
breaking interfacial Dzyaloshinskii-Moriya interaction (iDMI), it is possible
to stabilize a wide topological family, including AFM (anti)merons and bimerons
and the hitherto undiscovered AFM skyrmions. Whilst iDMI enforces homochirality
and improves the stability of these textures, the widely tunable anisotropy and
exchange interactions enable unprecedented control of their core dimensions. We
then present a unifying framework to model the scaling of texture sizes based
on a simple dimensional analysis. As the parameters required to host and tune
homochiral AFM textures may be obtained by rational materials design of $\alpha
\text{-Fe}_2 \text{O}_3$, it could emerge as a promising platform to initiate
AFM topological spintronics.
