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Laser-induced terahertz emission in Co 2 MnSi/Pt structure
Applied Physics Express ( IF 2.3 ) Pub Date : 2020-09-02 , DOI: 10.35848/1882-0786/abb1c9
Yuta Sasaki 1 , Yukiko Takahashi 1 , Shinya Kasai 1, 2
Affiliation  

In this study, the terahertz (THz) emission in a Co 2 MnSi/Pt structure was investigated. The THz emission intensity increased after annealing, and the optimized temperature was above 400 °C owing to the increase in B 2 ordering. The THz emission intensity of Co 2 MnSi/Pt was 1.4–2.0 times larger than that of CoFe/Pt. The THz conductivity for Co 2 MnSi/Pt was smaller than that for CoFe/Pt. The ultrafast spin-current intensity was almost the same in both materials. A small conductivity and comparable ultrafast spin-current injection into the Pt layer are possible reasons for the efficient THz emission in Co 2 MnSi/Pt.

中文翻译:

Co 2 MnSi / Pt结构中的激光诱导太赫兹发射

在这项研究中,研究了Co 2 MnSi / Pt结构中的太赫兹(THz)发射。退火后,THz发射强度增加,并且由于B 2有序增加,最优化温度超过400°C。Co 2 MnSi / Pt的THz发射强度是CoFe / Pt的1.4-2.0倍。Co 2 MnSi / Pt的THz电导率小于CoFe / Pt的THz电导率。两种材料的超快自旋电流强度几乎相同。导电性小和可比的超快速自旋电流注入Pt层是Co 2 MnSi / Pt中有效THz发射的可能原因。
更新日期:2020-09-03
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