在全范德瓦尔斯异构结构中使用大型非传统的旋转轨道扭矩进行强大的无电场切换
Yiyang Zhang1, Xiaolin Ren1, Ruizi Liu2
1Department of Physics, The Hong Kong University of Science and Technology, Kowloon, Hong Kong SAR, 999077, China.
Advanced materials (Deerfield Beach, Fla.)
|August 14, 2024
概括
这项研究证明了使用非传统的旋转轨道扭矩 (SOT) 在范德瓦尔斯异构中进行无场切换. 这一突破为未来的自旋电子设备提供了强大的磁化控制.
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:
- 所有范德瓦尔斯 (vdW) 磁性异构结构提供电场控制磁化.
- 使用非平面极化旋转电流的非传统旋转轨道扭矩 (SOT) 是高效磁化切换的关键.
- 挑战包括实现大型非传统SOT和确保VDW异构结构中的无现场开关稳定性.
研究的目的:
- 为了演示在一个全-vdW异构结构中的无磁场磁化切换.
- 调查非传统的SOT对外部磁场的效率和强度.
- 探索VDW异构结构对于基于SOT的先进设备的潜力.
主要方法:
- 制造一个全vdW异构结构,结合TaIrTe 4 (II型韦尔半金属) 和Fe 3 GaTe 2 (铁磁铁).
- 在电流下测试磁化切换的实验测量.
- 数字模拟以了解SOT机制和切换行为.
主要成果:
- 在电流密度为2.56 × 10 10 A m-2的300 K时实现完全无磁场的磁化切换.
- 确定了0.37的大型SOT有效场效率,用于外平面偏振自旋电流.
- 证明了强大的切换,极性维持到252mT的外部平面内磁场.
结论:
- 研究的全-vdW异构结构表现出大型的非传统SOT,可实现高效和强大的无现场切换.
- 这些发现突显了全-vdW异构结构在开发高效和稳定的SOT设备方面的潜力.
- 这项研究为下一代自旋电子应用铺平了道路,超越了传统设备.
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