在Py/FeMn接口上进行交换合诱导的旋转动态缓冲调制
Mingming Tian1, Qian Chen1, Wei Jiang1
1Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University, Nanjing 211189, China.
ACS applied materials & interfaces
|February 26, 2025
概括
接口交换合显著增强了-铁 (Py) /铁- (FeMn) 双层中的自旋动态阻尼,这对于自旋电子设备至关重要. 这种由交换合驱动的效应,比旋转送更能增强阻尼.
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:
- 旋转动态缓对于先进的磁性内存,传感器和逻辑系统至关重要.
- 接口反铁磁交换合是旋转式异构结构中的一个关键现象.
研究的目的:
- 为了研究Ni80Fe20(Py) /Fe50Mn50(FeMn) 双层的磁力学.
- 阐明界面交换合与旋转送在旋转动态阻尼中的作用.
主要方法:
- 系统地研究不同厚度的FeMn二层Py/FeMn.
- 引入一个铜 (Cu) 间隔器来解磁层.
- 分析旋转动态阻尼和旋转效应.
主要成果:
- 对于FeMn厚度> 5nm,会出现一个界面交换偏差场,显著增加旋转动态缓.
- 引入一个Cu间隔器可以抑制交换偏差并减少阻尼,由于旋转抽而导致的轻微增加.
- 在Py/Cu/FeMn三层中估计的界面旋转混合电导率为3.44nm-2,与FeMn的弱旋转轨道合有关.
- FeMn插入显示了短的旋转扩散长度,并证实了接口交换合在减压增强中的主导作用.
结论:
- 接口交换合是Py/FeMn双层中增强旋转动态阻尼的主要驱动因素,超过了旋转效应.
- 在Py/FeMn接口上的交换合促进了旋转放松,并阻碍了旋转传输.
- 将抗铁磁材料与交换合接口集成,为增强高频自旋电子应用提供了一个有前途的途径.
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