光激励纳米结构镍薄膜的磁化动力学
Magnetization dynamics in optically excited nanostructured nickel films
摘要：
本文研究了纳米结构镍薄膜的激光诱导磁化动力学。考虑到数百飞秒的时间尺度以及GHz制度的纳米尺寸的影响进行了讨论。虽然在短时间尺度上没有观察到纳米尺寸效应，但可以通过与微磁模拟的比较来确定GHz制度中的激发磁模式。的厚度依赖性揭示了洞察力的偶极之间的相互作用单个镍结构。此外，瞬态反射率的变化进行了讨论。
英文摘要：
In this work, Laser-induced magnetization dynamics of nanostructured nickel films is investigated. The influence of the nanosize is discussed considering the time-scale of hundreds of femtoseconds as well as the GHz regime. While no nanosize effect is observed on the short time-scale, the excited magnetic mode in the GHz regime can be identified by comparison with micromagnetic simulations. The thickness dependence reveals insight on the dipole interaction between single nickel structures. Also, transient reflectivity changes are discussed.
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