基于COPt合金的高效轨道轨道电磁发射
Yongshan Liu1,2,3, Yong Xu1,2, Albert Fert4
1National Key Laboratory of Spintronics, Hangzhou International Innovation Institute, Beihang University, Hangzhou, 311115, China.
Advanced materials (Deerfield Beach, Fla.)
|June 19, 2024
概括
研究人员开发了一种更有效的方法,使用-白金 (CoPt) 合金产生轨道电流,从而产生更强的太赫兹发射. 这一突破增强了开发先进轨道太赫兹发射器的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 光电学是指光电子产品.
背景情况:
- 轨道电子设备利用轨道极化电流进行操作.
- 目前的方法通过激光激发轨道电流,但在 (Ni) 等材料中,太赫兹发射效率是有限的.
研究的目的:
- 研究在-白金 (CoPt) 合金中高效的光诱导轨道电流的产生.
- 为了增强轨道电子设备的太赫兹 (THz) 辐射.
主要方法:
- 制造具有不同组成和层厚度的CoPt/Cu/MgO异构结构.
- 使用 femtosecond激光脉冲激发轨道电流.
- 太赫兹发射特性的表征.
主要成果:
- 与Ni相比,CoPt合金表现出更高效的光诱导轨道电流生成.
- 来自CoPt/Cu/MgO设备的太赫兹发射可与基准的自旋式太赫兹发射器相比较.
- 证实了CoPt内部的轨道电流生成,通过Cu的传播以及Cu/MgO界面的转换.
结论:
- CoPt合金是有效的轨道电流生成的有希望的材料.
- 这些发现为开发高效的轨道太赫兹发射器铺平了道路.
- 该研究阐明了来自轨道动态的THz发射机制.
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