Construction of 1D Vortex Chain Using a Chiral Nanostructure.,Advanced Science

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Construction of 1D Vortex Chain Using a Chiral Nanostructure.
Advanced Science ( IF 14.3 ) Pub Date : 2020-07-01 , DOI: 10.1002/advs.202001040
Zhenghua Li ₁ , Bin Dong ₁ , Yangyang He ₁ , Xiang Li ₂ , Aiying Chen ₂

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The construction and control of high‐order coupled vortices are a significant challenge for promoting the application of magnetic vortices. Thus far, only double‐coupled vortices have been produced and modulated in some ferromagnetic nanostructures. Here, an effective approach is provided to obtain a high‐order coupled vortex structure by using a chiral nanostructure. Double‐vortex, triple‐vortex, and n‐vortex chains can be successfully constructed using structured Fe₄N nanostrips and bias nanomagnets. The designed chiral nanostructure cannot only control the transport and hybridization of vortices but also modulate the domain walls of the vortex chain for spin wave (SW) propagation. At the exciting frequency of 1.2 GHz, the SW propagates along the domain walls formed in the vortex chain. Upon increasing the frequency to 5.0 GHz, the SW gradually spreads from the domain walls into domains. This technique will present a new perspective for the design and application of magnetic vortex‐based devices.

中文翻译：

使用手性纳米结构构建一维涡链。

高阶耦合涡旋的构建和控制是促进磁涡旋应用的重大挑战。到目前为止，在一些铁磁纳米结构中仅产生和调制了双耦合涡旋。这里，提供了一种利用手性纳米结构获得高阶耦合涡旋结构的有效方法。使用结构化 Fe ₄ N 纳米带和偏置纳米磁体可以成功构建双涡流、三涡流和n涡流链。设计的手性纳米结构不仅可以控制涡旋的传输和杂化，还可以调节涡旋链的畴壁以实现自旋波（SW）传播。在 1.2 GHz 的激励频率下，SW 沿着涡链中形成的畴壁传播。当频率增加到 5.0 GHz 时，SW 逐渐从畴壁扩散到畴中。该技术将为基于磁涡流的设备的设计和应用提供新的视角。

更新日期：2020-08-19

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