在室温范德瓦尔斯磁铁中,高效的电流诱导旋转扭矩和无磁场磁化切换
Chao Yun1,2,3, Haoran Guo1, Zhongchong Lin1
1State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China.
Science advances
|December 8, 2023
概括
研究人员使用自旋电流在范德瓦尔斯 (vdW) 磁铁中实现了室温磁化切换. 在VDW自旋电子技术的这一突破使得未来的设备可以有效地通过电气控制磁场.
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:
- 范德瓦尔斯 (vdW) 材料由于其干净的表面,为自旋电子提供了独特的特性.
- 在VDW磁铁中对磁性的电气操纵具有挑战性,通常需要冷条件和外部磁场.
- Fe3GaTe2表现出室温铁磁性和垂直磁性异性,使其成为螺旋电子应用的有希望的候选者.
研究的目的:
- 为了研究基于Fe3GaTe2的异构结构中磁性的高效电气操纵.
- 为了演示室温,无磁场磁化切换在VDW自旋电子设备中.
- 探索VDW磁铁在下一代逻辑,内存和神经形态计算方面的潜力.
主要方法:
- 使用Fe3GaTe2片制造异构结构.
- 磁性属性的表征,包括室温铁磁性和垂直磁性异性.
- 在Fe3GaTe2/Pt异构结构中测量强制场的电流驱动的非相互调制.
- 使用外平面偏振自旋电流和不对称几何体的无磁场磁化切换的演示.
主要成果:
- 铁3GaTe2/Pt异构结构具有较高的旋转扭矩效率.
- 完全磁化切换仅通过电流实现.
- 通过不对称几何设计成功演示了无磁场磁化切换.
- 在没有外部磁场的情况下实现室温操作.
结论:
- 开发的基于Fe3GaTe2的异构结构能够在室温下有效地电气控制磁性.
- 在VDW自旋电子设备中可以实现无磁场磁化开关,克服了实际应用的一个主要限制.
- 这项研究为开发用于逻辑,内存和神经形态计算的先进VDW自旋电子设备铺平了道路.
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