Intensity nonreciprocity reversal of spin wave in magnonic crystal by specific wavenumber excitation
Intensity nonreciprocity reversal of spin wave in magnonic crystal by specific wavenumber excitation
复制标题
特定波数激发磁振子晶体中自旋波强度非互易反转
DOI：
10.1088/1361-6463/ac791b
复制
发表时间：
2022
期刊：
影响因子：
--
通讯作者：
T. Manago
中科院分区：
文献类型：
--
作者：
T. Hara;K. Kasahara;T. Manago
采用微磁模拟方法研究了自旋波在特定波数激发的磁振子晶体中的传播。当在波数k处激发时的色散关系对应于布里渊区的边界，示出了一对源于磁振子上带和下带的强点。当激发波数稍微偏离k以上时，出现额外的强点，并显示强度非互易反转。它可以用布里渊区的重复区或缩减区方案来解释。这些特性具有新颖的非互易性控制的潜力。
Spin wave propagation in a magnonic crystal excited at a specific wavenumber was investigated by micromagnetic simulation modelling with meander-shaped antennae. The dispersion relation when excited at wave number k which corresponds to the boundary of the Brillouin zone, shows a pair of strong spots that originate from the magnonic upper and lower bands. When excited at wavenumber slightly offset from k above, additional strong spots appear and it shows intensity nonreciprocity reversal. It can be interpreted in terms of the repeated or reduced zone scheme of the Brillouin zone. These characteristics have the potential for novel control of nonreciprocity.