Nano-Magnonic Crystals by Periodic Modulation of Magnetic Parameters
Nano-Magnonic Crystals by Periodic Modulation of Magnetic Parameters
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DOI：
10.3390/magnetochemistry10030014
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发表时间：
2024-02
期刊：
影响因子：
2.7
通讯作者：
Alison Roxburgh;E. Iacocca
中科院分区：
文献类型：
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作者：
Alison Roxburgh;E. Iacocca
磁振子晶体是一种超材料，其磁振子行为可以针对特定应用进行控制。迄今为止，大多数磁振子晶体都依赖于纳米图案和静磁波。在这里，我们分析和数值研究磁振子晶体定义调制磁参数在纳米级，主要作用于交换为主，子100纳米磁振子。我们集中在两种情况下：在交换常数的变化，和交换常数。我们发现，交换常数调制引起适度的带隙中的前向体波和表面波配置。的调制的ε常数被发现有小的影响，磁振子能带结构，而不是导致预期的行为为未图案化的薄膜。我们相信，我们的结果对于未来纳米设计的磁振子晶体和磁振子器件的实验研究将会很有趣，其中材料参数可以局部控制，例如，by thermal热nano-lithography纳米光刻.
Magnonic crystals are metamaterials whose magnon behavior can be controlled for specific applications. To date, most magnonic crystals have relied on nanopatterning and magnetostatic waves. Here, we analytically and numerically investigate magnonic crystals defined by modulating magnetic parameters at the nanoscale, which predominantly act on exchange-dominated, sub-100 nm magnons. We focus on two cases: the variation in the exchange constant, and the DMI constant. We found that the exchange constant modulation gives rise to modest band gaps in the forward volume wave and surface wave configurations. The modulation of the DMI constant was found to have little effect on the magnonic band structure, leading instead to a behavior expected for unpatterned thin films. We believe that our results will be interesting for future experimental investigations of nano-designed magnonic crystals and magnonic devices, where material parameters can be locally controlled, e.g., by thermal nano-lithography.