巨大的旋转轨道扭矩在抗铁磁合Pt/[Co/Gd]N多层中,具有抑制的旋转脱相和强大的热稳定性
Zhicheng Xie1,2, Yumin Yang1,2, Bingyu Chen3
1State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China.
ACS applied materials & interfaces
|May 20, 2024
概括
研究人员开发了反铁磁合的[Co/Gd]多层,以提高旋转轨道扭矩 (SOT) 效率. 这种新设计增强了缩性SOT效率和热稳定性,为先进的电子产品提供了有前途的解决方案.
科学领域:
- 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
- 这就是Spintronics.
背景情况:
- 旋转轨道扭矩 (SOT) 对于高功率的旋转机内存和逻辑设备至关重要.
- 现有的重金属/铁磁金属二层由于旋转脱相和衰变而遭受低SOT效率 (ξDL).
- 在这些系统中,垂直磁性异构 (PMA) 被铁磁层厚度所限制,影响了热稳定性.
研究的目的:
- 设计和研究一种新的材料系统,以提高SOT效率和热稳定性.
- 为了克服spintronic应用中传统双层的局限性.
主要方法:
- 制造与反铁磁合的多层[Co/Gd]N.
- 系统地研究Pt/[Co/Gd]N结构中的SOT属性,具有不同的N.
- 旋转脱相抑制和批量PMA的特征.
主要成果:
- 在[Co/Gd]N的抗铁磁合有效地抑制了旋转脱相和旋转极化衰变.
- 在Pt/[Co/Gd]N中达到高达0.66的显著大的缓类SOT效率 (ξDL).
- 与Pt/Co和Pt/铁磁合金相比,证明了优越的 ξDL,归因于抑制的自转脱相.
结论:
- 抗铁磁合的[Co/Gd]N多层显示出增强的SOT效率和大量的PMA.
- 这些材料提供了更好的热稳定性,克服了传统HM/FM双层的局限性.
- 开发的[Co/Gd]N系统是低消耗,高密度自旋电子设备的有希望的候选者.
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