电流诱导磁化通过轨道拉什巴效应切换到轻金属氧化物/铁磁金属层
QiKun Huang1, Senmiao Liu1, Tianxiang Yang1
1Spintronics Institute, University of Jinan, Jinan 250022, China.
Nano letters
|November 29, 2023
概括
研究人员在没有重元素的CoFeB/CuO双层中证明了电流诱导的磁化逆转. 这一发现表明,轻金属氧化物对自旋电子设备具有前景,与重金属性能相匹配.
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:
- 轨道角动量 (OAM) 产生和扭矩是旋转轨道电子学的关键兴趣.
- 理论研究表明,氧化轻金属,如铜,可以通过表面轨道Rashba效应有效地产生OAM.
研究的目的:
- 通过实验证明CoFeB/CuO双层中电流诱导的,无磁场的,平面内磁化反转.
- 研究轻金属氧化物作为重金属替代品在自旋电子应用中的潜力.
主要方法:
- 制造没有重元素的CoFeB/CuO双层.
- 对磁化逆转的临界电流密度的实验测量.
- 使用第二和生成和磁光克尔效应 (MOKE) 测量进行表征.
主要成果:
- 在CoFeB/CuO双层中成功证明了电流诱导的平面磁化逆转.
- 实现了与重金属系统 (Pt, Ta) 相似的临界电流密度.
- 确定了颗粒内部的连贯旋转作为主要的磁化逆转机制.
结论:
- 轻金属氧化物,特别是CuO,可以有效地调解磁化逆转,类似于重金属.
- 这项研究扩大了工程先进的自旋电子设备的材料选择.
- 这些发现突显了轻金属氧化物在旋转轨道电子学中的重要作用.
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