Towards graded-index magnonics: Steering spin waves in magnonic networks
Towards graded-index magnonics: Steering spin waves in magnonic networks
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DOI：
10.1103/physrevb.92.020408
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发表时间：
2015-07-20
影响因子：
3.7
通讯作者：
Kruglyak, V. V.
中科院分区：
文献类型：
--
作者：
Davies, C. S.;Francis, A.;Kruglyak, V. V.
磁振子学探索磁性材料中有序自旋的旋进激发--所谓的自旋波--以及它们在磁振子波导网络中作为信息和信号载体的用途。在这里，我们证明了内部磁场和磁化强度的不均匀性固有的磁性结构创建一个介质的梯度折射率传播静磁波，并可用于引导其传播。这种非均匀性的特性可以通过外加磁场来调节和编程，这为梯度折射率磁振子领域开辟了令人兴奋的前景。
Magnonics explores precessional excitations of ordered spins in magnetic materials-so-called spin waves-and their use as information and signal carriers within networks of magnonic waveguides. Here, we demonstrate that the nonuniformity of the internal magnetic field and magnetization inherent to magnetic structures creates a medium of graded refractive index for propagating magnetostatic waves and can be used to steer their propagation. The character of the nonuniformity can be tuned and potentially programmed using the applied magnetic field, which opens exciting prospects for the field of graded-index magnonics.