通过接口工程提高现场效率,并插入亚原子层
Shuanghai Wang1,2, Kun He1,2, Caitao Li1,2
1School of Electronic Science and Engineering, Nanjing University, Nanjing, 210023, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|December 16, 2024
概括
在Pt-Co结构中的接口工程显著提高了类似现场的效率,大大降低了节能自旋电子设备的临界电流密度.
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:
- 传统上,研究的重点是缓冲效率 (βDL) 以降低关键开关电流密度 (Jc).
- 现场效率 (βFL) 越来越多地被认为在减少Jc.
研究的目的:
- 通过接口工程来增强Pt-Co中的中心反向不对称性.
- 为了研究Ta介层对βFL和Jc在自旋性异构结构中的影响.
主要方法:
- 在Pt-Co多层中使用亚原子Ta层的接口工程.
- 制造Ta/Pt/Ta (0.3纳米插入) /Co/Ta结构.
- 测量和分析βFL和Jc.
主要成果:
- 在βFL中实现了123%的增加,从-1.66到-3.8Oe/{MA cm−2).
- 在工程结构的Ta/Pt/Ta/Co/Ta中,与Ta/Pt/Co/Ta相比,Jc降低了90%以上.
- 显示显著低的Jc为2.7 MA cm−2.2.
结论:
- 接口工程是一种强大的策略,可以增强βFL并最大限度地减少Jc.
- 这些发现允许开发更高效和更低功率的基于旋转轨道扭矩 (SOT) 的旋转器件.
- 进一步的接口优化有可能大幅改善设备性能和节能.
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