Electrical and optical characterizations of spin-orbit torque

Hanshen Huang, Hao Wu, Tian Yu, Quanjun Pan, Bingqian Dai, Armin Razavi, Kin Wong, Baoshan Cui, Su Kong Chong, Di Wu, Kang L. Wang

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

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.

Original languageEnglish
Article number072405
JournalApplied Physics Letters
Volume118
Issue number7
DOIs
Publication statusPublished - 2021 Feb 15

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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