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Antiferromagnets hosting real-space topological spin textures are promisingplatforms to model fundamental ultrafast phenomena and explore spintronics.However, to date, they have only been fabricated epitaxially on specificsymmetry-matched crystalline substrates, to preserve their intrinsicmagneto-crystalline order. This curtails their integration with dissimilarsupports, markedly restricting the scope of fundamental and appliedinvestigations. Here, we circumvent this limitation by designing detachablecrystalline antiferromagnetic nanomembranes of $\alpha$-Fe$_{2}$O$_{3}$, thatcan be transferred onto other desirable supports after growth. We developtransmission-based antiferromagnetic vector-mapping to show that thesenanomembranes harbour rich topological phenomenology at room temperature.Moreover, we exploit their extreme flexibility to demonstrate three-dimensionalreconfiguration of antiferromagnetic properties, driven locally viaflexure-induced strains. This allows us to spatially design antiferromagneticstates outside their typical thermal stability window. Integration of suchfreestanding antiferromagnetic layers with flat or curved nanostructures couldenable spin texture designs tailored by magnetoelastic-/geometric-effects inthe quasi-static and dynamical regimes, opening new explorations intocurvilinear antiferromagnetism and unconventional computing.

Spatially reconfigurable topological textures in freestanding antiferromagnetic nanomembranes