Laser-induced terahertz emission in Co2MnSi/Pt structure

被引：7
|
作者：
Sasaki, Yuta [1 ]
Takahashi, Yukiko [1 ]
Kasai, Shinya [1 ,2 ]
机构：
[1] Natl Inst Mat Sci, Res Ctr Magnet & Spintron Mat, Tsukuba, Ibaraki 3050047, Japan
[2] JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 3320012, Japan
来源：
APPLIED PHYSICS EXPRESS | 2020年 / 13卷 / 09期
关键词：
spin current; Heusller alloys; terahertz emission; ultrafast spin dynamics; SPIN CURRENT;
D O I：
10.35848/1882-0786/abb1c9
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
In this study, the terahertz (THz) emission in a Co2MnSi/Pt structure was investigated. The THz emission intensity increased after annealing, and the optimized temperature was above 400 degrees C owing to the increase inB2 ordering. The THz emission intensity of Co2MnSi/Pt was 1.4-2.0 times larger than that of CoFe/Pt. The THz conductivity for Co2MnSi/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 Co2MnSi/Pt.
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页数：4
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