Magnonic Bending, Phase Shifting and Interferometry in a 2D Reconfigurable Nanodisk Crystal.
Magnonic Bending, Phase Shifting and Interferometry in a 2D Reconfigurable Nanodisk Crystal.
复制标题
二维可重构纳米盘晶体中的磁振子弯曲、相移和干涉。
DOI：
10.1021/acsnano.0c06894
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发表时间：
2020-08
期刊：
影响因子：
17.1
通讯作者：
K. Stenning;J. Gartside;T. Dion;A. Vanstone;D. Arroo;W. Branford
中科院分区：
文献类型：
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作者：
K. Stenning;J. Gartside;T. Dion;A. Vanstone;D. Arroo;W. Branford
强相互作用的纳米磁系统是下一代技术的关键，包括可重新配置的磁尼龙和神经形态计算。控制磁化状态和相邻纳米元素之间的局部耦合允许极大的可重构性和一系列相关功能。然而，现有的设计通常受制于无法定制制造后的元件间耦合和受限于一对伊辛磁化状态的纳米元件。在这里，我们提出了一类以纳米盘为功能元件的可重构磁子晶体。铁磁纳米盘在宏观自旋和涡旋状态下是关键的双稳，允许元素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，我们利用双稳纳米盘独特的耦合行为和磁子带结构，在2D网络上实现可重新编程的磁子波导、弯曲、选通和相移。通过展示XNOR逻辑功能的全磁振子干涉仪，展示了基于纳米盘的磁振子用于基于波的计算的潜力。在这里，局部微态控制是通过使用磁力显微镜尖端的拓扑磁写来实现的。
Strongly interacting nanomagnetic systems are pivotal across next-generation technologies including reconfigurable magnonics and neuromorphic computation. Controlling magnetization states and local coupling between neighboring nanoelements allows vast reconfigurability and a host of associated functionalities. However, existing designs typically suffer from an inability to tailor interelement coupling post-fabrication and nanoelements restricted to a pair of Ising-like magnetization states. Here, we propose a class of reconfigurable magnonic crystals incorporating nanodisks as the functional element. Ferromagnetic nanodisks are crucially bistable in macrospin and vortex states, allowing interelement coupling to be selectively activated (macrospin) or deactivated (vortex). Through microstate engineering, we leverage the distinct coupling behaviors 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.