Broadband conversion of microwaves into propagating spin waves in patterned magnetic structures
Broadband conversion of microwaves into propagating spin waves in patterned magnetic structures
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DOI：
10.1063/1.4995991
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发表时间：
2017-07-24
影响因子：
4
通讯作者：
Kruglyak, V. V.
中科院分区：
文献类型：
--
作者：
Mushenok, F. B.;Dost, R.;Kruglyak, V. V.
我们使用时间分辨扫描克尔显微镜和微磁模拟来证明，当被空间均匀的微波场驱动时，图案磁样品的边缘代表了有效和高度可调的传播自旋波源。激振是由于沿边缘排列的进动磁化产生的非均匀动态退磁场引起共振频率的局部增强。我们的研究结果代表了纳米级磁结构自旋波源设计的关键一步，也与理解和解释在图案磁性样品中由空间均匀磁场驱动的磁化动力学高度相关。AIP出版社出版。
We have used time-resolved scanning Kerr microscopy and micromagnetic simulations to demonstrate that, when driven by the spatially uniform microwave field, the edges of patterned magnetic samples represent both efficient and highly tunable sources of propagating spin waves. The excitation is due to the local enhancement of the resonance frequency induced by the non-uniform dynamic demagnetizing field generated by precessing magnetization aligned with the edges. Our findings represent a crucial step forward in the design of nanoscale spin-wave sources for magnonic architectures and are also highly relevant to the understanding and interpretation of magnetization dynamics driven by spatially uniform magnetic fields in patterned magnetic samples. Published by AIP Publishing.