通过中的轨道大厅效应诱导的高效非线性抗铁磁状态切换
Hang Xie1, Nan Zhang1,2, Yuteng Ma1,3
1Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117583, Singapore.
Nano letters
|November 1, 2023
概括
研究人员利用轨道霍尔电流探索了反铁磁Mn3Sn/Cr的电转换. 像这样的轻金属显示出反铁磁自旋电子的潜力,提供高效的轨道和自旋电流生成.
科学领域:
- 这就是Spintronics.
- 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
背景情况:
- 轨道霍尔电流是一种用于切换铁磁磁化的新方法.
- 反铁磁螺旋电子技术比传统铁磁螺旋电子技术具有优势.
研究的目的:
- 为了研究Mn3Sn/Cr异构中反铁磁状态的电转换.
- 探索轻金属,特别是 (Cr) 的潜力,作为反铁磁自旋电子学中轨道和自旋电流的来源.
主要方法:
- 制造和表征Mn3Sn/Cr异构结构.
- 电气运输测量以评估磁性切换.
- 太赫兹发射光谱检测旋转电荷转换效率.
- 分析Cr层厚度的依赖性,以确定扩散长度.
主要成果:
- 在Mn3Sn/Cr中实现了反铁磁状态的电转换,电流密度与重金属异构相比,尽管Cr的旋转霍尔角度较小.
- 在基于Cr的异构结构中,旋转到充电的转换效率明显低于基于Pt的系统,由较低的太赫兹发射和磁电阻表明.
- 随着Cr厚度的增加 (扩散长度~11 nm),太赫兹发射的缓慢衰减表明Cr的轨道电流生成,然后是有效的旋转电流转换.
结论:
- 在Mn3Sn/Cr异构结构中充当有效的轨道电流源.
- 观察到的磁切换很可能是由Cr.的轨道电流生成驱动的.
- 像Cr这样的轻金属有望成为有效的轨道/自旋电流来源,用于推进反铁磁自旋电子学.
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