2D Fe3O4纳米板的旋转运输调制由Verwey相位过渡驱动
Zhiyan Jia1,2, Mengfan Zhao1, Qian Chen3,4
1Institute of Quantum Materials and Devices, School of Materials Science and Engineering, Tiangong University, Tianjin, 300387, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|September 4, 2024
概括
合成了环境稳定的二维氧化铁 (Fe3O4) 纳米片,并表现出室温磁性. 这些2D Fe3O4纳米片显示了先进的旋转电子存储设备的潜力.
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:
- 在重金属和二维磁性材料之间高效的自旋传输对于自旋电子数据存储至关重要.
- 高基里温度 (TC) 和环境稳定性是开发二维磁性材料的关键挑战.
研究的目的:
- 为了合成环境稳定的2D Fe3O4纳米片.
- 为了研究 (Pt) 和2D Fe3O4.4的界面上的旋转传输特性.
- 为了评估2D Fe3O4在自旋电子应用中的潜力.
主要方法:
- 无层2D Fe3O4纳米片的可复制合成.
- 拉曼表征来识别Verwey相位过渡温度 (TV).
- 斯宾霍尔设备测量了Pt/Fe3O4双层.
主要成果:
- 合成的2D Fe3O4纳米板在室温下呈现的磁域.
- 在≈3 nm厚的纳米薄膜中确定了≈110 K的Verwey相变温度 (TV).
- 观察到磁阻比的变化和T附近的旋混合电导率 (Gr) 的增加,达到最大的≈5 × 1015 Ω-1m-2.
结论:
- Pt和2D Fe3O4之间的干净和平面接口有助于高自旋混合电导率.
- 2D Fe3O4纳米板显示出高功率微型自旋电子存储器件的巨大潜力.
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