Co2Fe0.4Mn0.6Si Heusler合金/重金属双层层产生太赫兹瞬态

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) Pub Date : 2021-08-29 DOI:10.1109/IRMMW-THz50926.2021.9567270

S. Heidtfeld, R. Adam, T. Kubota, K. Takanashi, S. Suga, D. Cao, C. Greb, F. Wang, C. Schmitz-Antoniak, D. Bürgler, G. Chen, I. Komissarov, R. Sobolewski, C. Schneider

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引用次数: 0

摘要

利用fs激光脉冲激发Co2Fe0.4Mn0.6Si Heusler合金/重金属双分子层，产生了频率高达太赫兹的电磁瞬变。我们将此过程归因于逆自旋霍尔效应。我们将结果与铁磁共振测量结果进行了比较，以研究界面自旋电流的效率。我们观察到太赫兹辐射的效率可以用自旋轨道耦合来描述，但界面性质起着重要的作用。

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Generation of Terahertz Transients from Co2Fe0.4Mn0.6Si Heusler alloy/Heavy-Metal Bilayers

We generated electro magnetic transients with a frequency content up to the terahertz regime from Co2Fe0.4Mn0.6Si Heusler alloy/heavy-metal bilayers by excitation with fs-laser pulses. We ascribe the generation process to the inverse spin Hall effect. We compared our results with ferromagnetic resonance measurements to investigate the efficiency of interfacial spin currents. We observed that the efficiency of the THz radiation can be described by the spin-orbit coupling, nonetheless the interface properties play an important role.

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2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz)

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