在Pt/Cr2O3/Co三层中通过180°Nel向量逆转进行电流诱导磁化切换
Yongming Luo1,2, Junjie Yuan2, Haoran Chen3
1College of Physics, Donghua University, Shanghai, 201620, China.
Advanced materials (Deerfield Beach, Fla.)
|September 9, 2025
概括
研究人员证明了在反铁磁氧化 (Cr2O3) 中,旋转轨道扭矩 (SOT) 诱导了尼尔向量的180°切换. 这一发现对于开发先进的反铁磁记忆器件至关重要.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 这就是Spintronics.
背景情况:
- 旋转轨道扭矩 (SOT) 可以操纵磁状态.
- 反铁磁材料为高密度,高速内存提供了潜力.
- 反铁磁尼尔向量的电转换在实验上具有挑战性.
研究的目的:
- 为在Cr2O3.3中垂直Nel向量的SOT诱导的180°切换提供明确的证据.
- 为了研究Neel向量切换对相邻铁磁层的影响.
- 探索Cr2O3在反铁磁螺旋电子装置中的潜力.
主要方法:
- 制造一个Pt/Cr2O3/Co三层结构.
- 旋转轨道扭矩的应用以诱导切换.
- 测量磁性切换行为和交换偏差.
- 场冷却协议调整反铁磁状态.
主要成果:
- 在Cr2O3.3中证明了SOT诱导的垂直Neel向量的180°切换.
- 在覆盖的Co.层中观察到非常规的切换行为.
- 由于Cr2O3.3,Co层的反转切换极性是由于Cr2O3.
- 与 Co. 层同时切换交换偏差方向.
- 对Cr2O3反铁磁状态的切换比率灵敏度,可通过场冷却调节.
结论:
- 支持了在Cr2O3.3中垂直的Neel向量的电转换的可行性.
- 突出了Cr2O3在控制相邻铁磁层的切换行为中的作用.
- 展示了基于Cr2O3的异构结构在反铁磁螺旋电子应用和内存设备中的潜力.
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