自支撑反铁磁纳米膜中的空间可重构拓扑织构
Spatially reconfigurable topological textures in freestanding antiferromagnetic nanomembranes
AI总结：
本文提出可剥离的α-Fe₂O₃反铁磁纳米膜，通过透射矢量成像和挠曲应变实现室温拓扑织构的三维空间重构，为曲线反铁磁学和非传统计算开辟新路径。
摘要：
承载实空间拓扑自旋织构的反铁磁体是模拟基本超快现象和探索自旋电子学的有前景平台。然而，迄今为止，它们只能在特定对称性匹配的晶体衬底上外延制备，以保持其固有的磁晶有序性。这限制了它们与不同支撑结构的集成，显著缩小了基础研究和应用研究的范围。在此，我们通过设计可剥离的α-Fe₂O₃晶体反铁磁纳米膜来规避这一限制，这些纳米膜在生长后可转移到其他所需支撑物上。我们开发了基于透射的反铁磁矢量成像方法，证明这些纳米膜在室温下承载丰富的拓扑现象。此外，我们利用其极高的柔韧性，展示了通过挠曲诱导应变在局部驱动的反铁磁性质的三维重构。这使我们能够在典型热稳定窗口之外空间设计反铁磁态。将此类自支撑反铁磁层与平面或曲面纳米结构集成，可以在准静态和动力学区域中实现由磁弹效应或几何效应定制的自旋织构设计，为曲线反铁磁性和非传统计算开辟新的探索方向。
英文摘要：
Antiferromagnets hosting real-space topological spin textures are promising platforms to model fundamental ultrafast phenomena and explore spintronics. However, to date, they have only been fabricated epitaxially on specific symmetry-matched crystalline substrates, to preserve their intrinsic magneto-crystalline order. This curtails their integration with dissimilar supports, markedly restricting the scope of fundamental and applied investigations. Here, we circumvent this limitation by designing detachable crystalline antiferromagnetic nanomembranes of $α$-Fe$_{2}$O$_{3}$, that can be transferred onto other desirable supports after growth. We develop transmission-based antiferromagnetic vector-mapping to show that these nanomembranes harbour rich topological phenomenology at room temperature. Moreover, we exploit their extreme flexibility to demonstrate three-dimensional reconfiguration of antiferromagnetic properties, driven locally via flexure-induced strains. This allows us to spatially design antiferromagnetic states outside their typical thermal stability window. Integration of such freestanding antiferromagnetic layers with flat or curved nanostructures could enable spin texture designs tailored by magnetoelastic-/geometric-effects in the quasi-static and dynamical regimes, opening new explorations into curvilinear antiferromagnetism and unconventional computing.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
