A scenario for magnonic spin-wave traps.
A scenario for magnonic spin-wave traps.
复制标题
宏伟的自旋波陷阱的场景。
DOI：
10.1038/srep12824
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发表时间：
2015-08-17
影响因子：
4.6
通讯作者：
Münzenberg M
中科院分区：
文献类型：
--
作者：
Busse F;Mansurova M;Lenk B;von der Ehe M;Münzenberg M
空间分辨的测量薄CoFeB薄膜上的磁化强度动态引起的强激光泵浦脉冲显示，所产生的自旋波模式的频率强烈依赖于到泵浦中心的距离。这可以归因于激光产生的温度曲线。我们确定的自旋波频率的0.5 GHz的移位，由于空间热分布引起的飞秒泵浦脉冲，持续高达一纳秒。类似的实验磁振子晶体组成的CoFeB膜为基础的反点晶格与达蒙Eshbach模式在布里渊区边界和其后果进行了讨论。
Spatially resolved measurements of the magnetization dynamics on a thin CoFeB film induced by an intense laser pump-pulse reveal that the frequencies of resulting spin-wave modes depend strongly on the distance to the pump center. This can be attributed to a laser generated temperature profile. We determine a shift of 0.5 GHz in the spin-wave frequency due to the spatial thermal profile induced by the femtosecond pump pulse that persists for up to one nanosecond. Similar experiments are presented for a magnonic crystal composed of a CoFeB-film based antidot lattice with a Damon Eshbach mode at the Brillouin zone boundary and its consequences are discussed.