在铁磁/反铁磁系统中,通过旋转轨道扭矩对垂直交换偏差和可编程旋转逻辑单元的不对称操纵
Lei Guo1, Guopeng Shi1, Guocai Wang1
1State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering, University of Electronic Science and Technology of China, 22006 Xiyuan Avenue, High-tech Zone (West), Chengdu, Sichuan, 611731, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|July 10, 2024
概括
反铁磁铁使先进的自旋磁器件成为可能. 研究人员演示了旋转轨道扭矩操纵磁力,并使用不对称的反铁磁域行为实现了逻辑门.
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:
- 抗铁磁 (AFM) 材料对下一代自旋电子设备来说是有前途的,因为它们的小尺寸和低功耗.
- 在使用旋转轨道扭矩 (SOT) 的铁磁 (FM) /AFM系统中,磁化和交换偏差 (EB) 的电气操纵是一个关键的研究重点.
研究的目的:
- 在Co/IrMn系统中实现一个大型垂直交换偏差场.
- 通过SOT.证明通过Pt/Co/IrMn系统中磁矩和EB场的有效操纵.
- 探索SOT驱动的不对称切换在逻辑门实现中的潜力.
主要方法:
- Pt/Co/IrMn异构结构的制造.
- 使用磁光学克尔效应 (MOKE) 测量进行表征.
- 通过电流脉冲使用旋转轨道扭矩对磁态进行电气操纵.
主要成果:
- 在Co/IrMn.中实现了一个大型垂直交换偏差场.
- 在Pt/Co/IrMn.中证明了SOT驱动的磁矩和EB场的操纵.
- 由于共存的稳定和转移稳定的AFM域,观察到不对称的切换行为.
- 在使用SOT的单个单元中成功实现了五个旋转逻辑门 (AND,OR,NOR,NAND,NOT).
结论:
- SOT对抗铁磁材料表现出独特的控制.
- FM/AFM结构的不对称性特性可用于逻辑运算.
- 这项工作为基于AFM自旋电子的逻辑内存和神经形态计算铺平了道路.
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