Realisation of a frustrated 3D magnetic nanowire lattice
Realisation of a frustrated 3D magnetic nanowire lattice
复制标题
DOI：
10.1038/s42005-018-0104-6
复制
发表时间：
2019-02-01
影响因子：
5.5
通讯作者：
Ladak, Sam
中科院分区：
文献类型：
--
作者：
May, Andrew;Hunt, Matthew;Ladak, Sam
在三维中图案化纳米磁体在凝聚态物理学中提出了一个新的范例，并允许访问大量的现象，包括强大的自旋纹理，磁性超材料的家庭携带磁荷和存储信息的三维密度设备的缺陷。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。
Patterning nanomagnets in three-dimensions presents a new paradigm in condensed matter physics and allows access to a plethora of phenomena including robust spin textures, magnetic metamaterials 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.