三维受抑磁性纳米线晶格的实现
Realisation of a Frustrated 3D Magnetic Nanowire Lattice
摘要：
在三维中图案化纳米磁体在凝聚态物理中呈现了一种新的范例，并且允许访问过多的基本现象，包括稳健的自旋纹理、作为携带磁荷的缺陷的家的磁性超材料以及在三维中存储信息的磁密度设备。然而，迄今为止，将功能磁性材料纳米结构化为复杂的三维几何形状已被证明是一项艰巨的挑战。在这里，我们显示磁性纳米线可以安排成3D挫折磁性纳米线晶格，通过使用3D聚合物纳米打印和金属沉积的组合。所制备的纳米线是单畴的，它们通过畴壁的成核和扩展来切换。深度纳米级磁成像和有限元模拟阐明了存在于3D纳米结构晶格上的自旋纹理。我们的研究展示了一个通用的平台，用于生产3D纳米结构的磁性材料，允许实现跑道存储器设备和3D纳米结构的系统，模仿散装受挫晶体。
英文摘要：
Patterning nanomagnets in three-dimensions presents a new paradigm in condensed matter physics and allows access to a plethora of fundamental phenomena including robust spin textures, magnetic metamaterials that are home to defects carrying magnetic charge and ultrahigh density devices that store information in three-dimensions. However, the nanostructuring of functional magnetic materials into complex three-dimensional geometries has thus far proven to be a formidable challenge. Here we show magnetic nanowires can be arranged into 3D frustrated magnetic nanowire lattices by using a combination of 3D polymer nanoprinting and metallic deposition. The fabricated nanowires are single domain and they switch via nucleation and propagation of domain walls. Deep nanoscale magnetic imaging and finite element simulations elucidate the spin texture present on the 3D nanostructured lattice. Our study demonstrates a generic platform for the production of 3D nanostructured magnetic materials allowing the realisation of racetrack memory devices and 3D nanostructured systems that mimic bulk frustrated crystals.
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