Magnonic band gaps in waveguides with a periodic variation of the saturation magnetization
Magnonic band gaps in waveguides with a periodic variation of the saturation magnetization
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DOI：
10.1103/physrevb.88.134406
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发表时间：
2013-05
影响因子：
3.7
通讯作者：
F. Ciubotaru;A. Chumak;B. Obry;A. Serga;B. Hillebrands
中科院分区：
文献类型：
--
作者：
F. Ciubotaru;A. Chumak;B. Obry;A. Serga;B. Hillebrands
我们提出了自旋波在磁振子晶体中传播的微磁分析，该晶体被实现为坡莫合金自旋波波导，其饱和磁化强度具有空间周期性变化。在自旋波传输谱中可以清楚地观察到频率带隙，其起源可以追溯到基本和高阶自旋波宽度模式的各个带隙的重叠。本研究讨论了通过磁化强度降低的宽度区域和调制水平对阻带间隙的深度、宽度以及频率和空间位置的控制。
We present a micromagnetic analysis of spin-wave propagation in a magnonic crystal realized as a permalloy spin-wave waveguide with a spatial periodical variation of its saturation magnetization. Frequency band gaps were clearly observed in the spin-wave transmission spectra, and their origin is traced back to an overlap of individual band gaps of the fundamental and higher-order spin-wave width modes. The control of the depth, width, and position in frequency and space of the rejection band gaps by the width areas with a reduced magnetization and by the modulation level is discussed in this study.