Spatially reconfigurable topological textures in freestanding antiferromagnetic nanomembranes

Antiferromagnets hosting real-space topological spin textures are promising platforms to explore novel fundamental and functional spintronics phenomena.To date, they have only been fabricated epitaxially on specific symmetry-matched crystalline substrates, which preserve their intrinsic magneto-crystalline order. This curtails integration of topological antiferromagnets with dissimilar 2D/3D supports, markedly restricting the scope of fundamental and applied investigations. Here, we circumvent this limitation by designing detachable crystalline antiferromagnetic nanomembranes that can be transferred onto other desirable supports after growth. We develop transmission-based antiferromagnetic vector-mapping to show that these nanomembranes also harbour rich topological phenomenology at room temperature. Moreover, we exploit their extreme flexibility to demonstrate 3D antiferromagnetic state reconfiguration, which is driven locally via flexure-based strains. Integration of such freestanding antiferromagnetic layers onto targeted supports could enable new explorations into magnetoelastic and geometry-controlled spin texture design, quasi-static and dynamical antiferromagnetic studies, and development of unconventional computing platforms.