二维可重构纳米盘晶体的磁致弯曲、相移和干涉测量
Magnonic bending, phase shifting and interferometry in a 2D reconfigurable nanodisk crystal
摘要：
强相互作用的纳米磁系统是下一代技术的关键，包括可重构磁子和神经形态计算。控制磁化状态和相邻纳米元件之间的局部耦合允许大量的可重新配置功能和许多相关功能。然而，现有的设计通常遭受无法定制元件间耦合后制造和纳米元件限制到一对伊辛类磁化状态。在这里，我们提出了一类新的可重构磁振子晶体纳入纳米盘作为功能元件。磁性纳米盘在宏观自旋和涡旋状态下是至关重要的，允许元件间的耦合被选择性地激活（宏观自旋）或去激活（涡旋）。通过微态工程，我们利用不同的耦合行为和磁能带结构的nanodisks实现可重新编程的磁波导，弯曲，门控和相移整个2D网络。基于纳米盘的磁振子波为基础的计算的潜力证明通过一个全磁振子干涉仪展示XNOR逻辑功能。局部微观状态控制在这里实现通过拓扑磁写入使用磁力显微镜尖端。
英文摘要：
Strongly-interacting nanomagnetic systems are pivotal across next-generation technologies including reconfigurable magnonics and neuromorphic computation. Controlling magnetisation state and local coupling between neighbouring nanoelements allows vast reconfigurable functionality and a host of associated functionalities. However, existing designs typically suffer from an inability to tailor inter-element coupling post-fabrication and nanoelements restricted to a pair of Ising-like magnetisation states. Here, we propose a new class of reconfigurable magnonic crystal incorporating nanodisks as the functional element. Magnetic nanodisks are crucially bistable in macrospin and vortex states, allowing inter-element coupling to be selectively activated (macrospin) or deactivated (vortex). Through microstate engineering, we leverage the distinct coupling behaviours and magnonic band structures of bistable nanodisks to achieve reprogrammable magnonic waveguiding, bending, gating and phase-shifting across a 2D network. The potential of nanodisk-based magnonics for wave-based computation is demonstrated via an all-magnon interferometer exhibiting XNOR logic functionality. Local microstate control is achieved here via topological magnetic writing using a magnetic force microscope tip.
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