Electrical and optical characterizations of spin-orbit torque
Abstract
To further reduce the energy consumption in spin–orbit torque devices, it is crucial to precisely quantify the spin–orbit torque (SOT) in different materials and structures. In this work, heavy metal/ferromagnet and heavy metal/ferrimagnet heterostructures are employed as the model systems to compare the electrical and optical methods for the SOT characterization, which are based on the anomalous Hall effect and the magneto-optical Kerr effect, respectively. It is found that both methods yield the consistent SOT strength for the current-driven magnetization switching measurements and the harmonic measurements. Our results suggest that the optical method is a feasible and reliable tool to investigate SOT, which is a powerful way to develop insulator-based magnetic systems in the future.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 15, 2021
- Source ID
- 10.1063/5.0045091
Entities
People
- Baoshan Cui
- Bingqian Dai
- Di Wu
- H. Wu
- Hanshen Huang
- Kang L. Wang
- Kin Wong
- Quanjun Pan
- Seyed Armin Razavi
- Su Kong Chong
- Yu Tian
Organizations
- National Science Foundation
- United States Department of Energy