部分氧化对Fe/MgO/Fe道连接处的运输的影响
Assaous Boubaker1, Baadji Nadjib2, Zanat Kamel3
1Département de Physique & Laboratoire de Physique et Chimie des Matériaux, Faculté des Sciences, Université Mohamed Boudiaf, M'sila 28000, Algérie.
Journal of physics. Condensed matter : an Institute of Physics journal
|November 26, 2025
概括
在磁道连接处的界面氧化显著降低了性能. 我们的量子传输模型显示,通过顶点校正捕获的失序辅助散射对于理解现实的自旋电子设备行为至关重要.
科学领域:
- 这就是Spintronics.
- 材料科学 材料科学 材料科学
- 量子运输是一种量子运输.
背景情况:
- 铁/MgO/Fe磁道连接对于自旋器件至关重要.
- 接口氧化严重限制了它们的性能,但理论模型是不完整的.
研究的目的:
- 开发一个理论框架,以了解磁道连接处的界面氧化.
- 研究氧化对自旋依赖的传输和道磁电阻 (TMR) 的影响.
主要方法:
- 开发了一种 *ab initio* 量子运输方法.
- 集成的连贯电位近似与顶点校正,以建模无序接口.
- 在氧化Fe/MgO接口中模拟自旋依赖运输.
主要成果:
- 氧化抑制TMR,诱导偏差不对称,并在高偏差时引起负的TMR.
- 不连贯的散射,以顶点校正为模式,成为主要的运输机制.
- 由于竞争的运输机制,不对称的接口和增加的MgO厚度对TMR产生不同的影响.
结论:
- 顶点校正对于在无序的自旋电子接口中准确建模量子运输至关重要.
- 开发的框架为设计改进的磁道交叉点提供了预测能力.
- 了解界面障碍是优化自旋电子设备性能的关键.
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