在 [111] - 导向的 Pt / Co 异构结构中对垂直磁化进行全电操纵,通过无异型环轴应变使之成为可能
Haiming Xu1, Qirui Cui2,3, Jijun Yun4
1School of Physical Science and Technology, Lanzhou University, Lanzhou, Gansu 730000, China.
Nano letters
|April 15, 2025
概括
研究人员在Pt/Co异构结构中使用旋转轨道扭矩 (SOT) 来演示垂直磁化的电控制. 经轴应变打破了对称性,使先进的磁器件能够进行无场切换和布尔逻辑操作.
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
- 纳米技术纳米技术
背景情况:
- 旋转轨道扭矩 (SOT) 为旋转器件提供了有效的磁化操纵.
- 在高对称性材料中,垂直磁化的无场切换至关重要,但具有挑战性.
- 长轴异构结构为探索新型磁现象提供了一个平台.
研究的目的:
- 为了实现垂直磁化的完全电操纵,在一个轴[111]导向的Pt/Co异构结构中.
- 为了研究异构性表轴应变在破坏磁对称性的作用.
- 为了证明SOT设备用于逻辑操作的可行性.
主要方法:
- 制造面向[111]的表轴性Pt/Co异构结构.
- 电流的应用以诱导旋转轨道扭矩.
- 使用应变工程分析磁化动力学和对称性过渡.
- 布尔逻辑运算的实验演示.布尔逻辑运算的实验演示.
主要成果:
- 不同类型的表轴性菌株在Pt/Co异构结构中诱导了从C3到C1的对称性过渡.
- 应变产生了重要的平面磁化元件,打破了磁对称性.
- 观察到强大的高温性能 (高达393K) 的应变诱导的对称性破坏.
- 八个不同的布尔逻辑运算在单个SOT设备中成功地演示.
结论:
- 利用表轴应变是一种有效的方法,可以在磁性异构结构中打破平面内对称性.
- 这种方法可以实现垂直磁化的无场SOT切换.
- 演示的逻辑操作凸显了基于SOT的实际设备的潜力.
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