大间层Dzyaloshinskii-Moriya跨Ag层的相互作用
Jon Ander Arregi1, Patricia Riego1,2, Andreas Berger1
1CIC nanoGUNE BRTA, Tolosa Hiribidea 76, E-20018, Donostia-San Sebastián, Spain.
研究人员在Co/Ag/Co三层中增强了间层Dzyaloshinskii-Moriya相互作用 (IL-DMI). 这项研究观察到显著的,依赖厚度的性相互作用,为新的3D性旋转结构铺平了道路.
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:
- 间层Dzyaloshinskii-Moriya相互作用 (IL-DMI) 对旋转器件至关重要.
- 提高IL-DMI强度是开发先进的性旋转结构的关键.
- 协同/Ag/Co三层为可调整的性磁相互作用提供了一个潜在的平台.
研究的目的:
- 为了研究IL-DMI在Co/Ag/Co三层中的强度和厚度依赖.
- 探索原子和Rashba旋转轨道合 (SOC) 在增强IL-DMI中的作用.
- 为了确定Co/Ag/Co三层能否促进平面内性.
主要方法:
- 使用了对表面敏感的磁光学测量,利用光线透深度.
- 研究了在Co/Ag/Co三层中有效的层间合的厚度演变.
- 分析了由此产生的铁磁层之间的奇拉相互作用.
主要成果:
- 在Co/Ag/Co三层中观察到振荡和厚度依赖的性相互作用.
- 达到了比许多重金属系统大得多的IL-DMI等级,达到≈±0.2mJ/m2.
- 证明Co/Ag/Co三层促进平面内性,与众多已知的多层不同.
结论:
- 同/Ag/Co三层表现出强烈的IL-DMI,即使具有弱Ag原子SOC.
- 在Co/Ag/Co中观察到的平面内性为设计3D性旋转结构提供了新的途径.
- 这项研究为增强DMI在自旋电子应用中的实力提供了基础.
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