4.6 Article

Generation of spin currents by the orbital Hall effect in Cu and Al and their measurement by a Ferris-wheel ferromagnetic resonance technique at the wafer level

期刊

PHYSICAL REVIEW B
卷 106, 期 14, 页码 -

出版社

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.106.144415

关键词

-

资金

  1. Israel Science Foundation [1217/21]
  2. Peter Brojde Center for Innovative Engineering and Computer Science
  3. Center for Nanoscience and Nanotechnology of the Hebrew University of Jerusalem

向作者/读者索取更多资源

The Ferris FMR is a wideband and highly sensitive ferromagnetic resonance method that measures the absorption line rather than its derivative, with at least an order of magnitude higher sensitivity compared to conventional FMR systems. Using this method, spin currents generated from the orbital Hall effect in pure Cu and Al are reported. Cu exhibits a large effective spin Hall angle exceeding that of Pt, while Al possesses an orbital Hall effect of opposite polarity as predicted by theory.
We present a ferromagnetic resonance (FMR) method that we term the Ferris FMR. It is wideband, has at least an order of magnitude higher sensitivity as compared to conventional FMR systems, and measures the absorption line rather than its derivative. It is based on large-amplitude modulation of the externally applied magnetic field that effectively magnifies signatures of the spin-transfer torque making its measurement possible even at the wafer level. Using the Ferris FMR, we report the generation of spin currents from the orbital Hall effect taking place in pure Cu and Al. To this end, we use the spin-orbit coupling of a thin Pt layer introduced at the interface that converts the orbital current to a measurable spin current. While Cu reveals a large effective spin Hall angle exceeding that of Pt, Al possesses an orbital Hall effect of opposite polarity in agreement with the theoretical predictions. Our results demonstrate additional spin-and orbit functionality for two important metals in the semiconductor industry beyond their primary use as interconnects with all the advantages in power, scaling, and cost.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据