通过非均的氧气八面体倾斜/旋转产生外平面极化自旋电流
Furong Han1, Jing Zhang2, Fan Yang3
1Fert Beijing Research Institute, National Key Lab of Spintronics, School of Integrated Circuit Science and Engineering, Beihang University, 100191, Beijing, P. R. China.
Nature communications
|August 24, 2024
概括
研究人员在偏磁CaRuO3膜中设计了晶体对称性,以产生异平面极化自旋电流. 这一突破使先进的自旋电子设备能够高效,无场旋转轨道扭矩切换.
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:
- 旋转轨道扭矩 (SOT) 能够实现垂直磁化的无场切换,这对于高密度内存和逻辑设备至关重要.
- 具有低内在对称性的材料通常用于产生必要的外平面偏振自旋电流.
- 控制自旋电流的工程材料对称性仍然是一个未被充分探索的领域.
研究的目的:
- 通过对材料的晶体对称度进行工程,证明产生异平面极化自旋电流的过程.
- 为了研究对磁性CaRuO3薄膜在自旋电子应用中的潜力.
- 通过晶体对称设计建立一种用于操纵自旋电流的新策略.
主要方法:
- 制造具有偏磁性的CaRuO3薄膜.
- 分析晶体对称性,专注于氧的八面体倾斜/旋转在接口附近.
- 测量旋转电流的产生及其对垂直磁化开关的影响.
主要成果:
- 偏磁CaRuO3薄膜成功地产生了一个外平面极化自旋电流.
- 工程结晶对称性,特别是由于氧八面体合而破坏的螺丝轴和滑翔平面对称性,被确定为旋转电流的来源.
- 生成的旋转电流有效地驱动了垂直磁化的无场切换.
结论:
- 在CaRuO3中的晶体对称工程是一种可行的方法,可以产生显著的外平面偏振旋转电流.
- 这种方法为开发具有高密度内存和逻辑能力的先进自旋电子设备提供了一个有前途的途径.
- 这些发现通过利用对称性操纵,为自旋电子中的材料设计开辟了新的途径.
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