Large spin-orbit torque observed in epitaxial SrIrO 3 thin films
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document.pdf
Description
Published version
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1.86 MB
Format
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Checksum (MD5)
f36556d6fd2a83e29213c86ae51450ca
Author(s)
Wang, Hailong
Meng, Keng-Yuan
Zhang, Pengxiang
Hou, Justin T
Finley, Joseph
Han, Jiahao
Yang, Fengyuan
Liu, Luqiao
Date Issued
2019
Journal
Applied Physics Letters
Publisher
AIP Publishing
Version
Final published version
Abstract
© 2019 Author(s). Semimetallic iridate compound SrIrO3 epitaxial films have been deposited by off-axis sputtering, exhibiting excellent crystalline quality as well as smooth surfaces. By performing second-harmonic Hall measurements on a series of SrIrO3/Co1-xTbx bilayers, we quantitatively determined the spin-to-charge interconversion efficiency θ SH of SrIrO3 and discovered a systematic temperature and film thickness dependent evolution behavior. Notably, the measured θ SH reaches a remarkably large number of ∼1.1 at room temperature, which is significantly larger than the value of 5d transition metals and comparable to the values reported in some topological material systems. Our findings are further corroborated by ferromagnetic resonance-driven spin pumping studies in SrIrO3/Py bilayers, highlighting the significant opportunities offered by the iridate compounds in designing next-generation energy-efficient multifunctional spin Hall devices.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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DOI of Published Version
https://doi.org/10.1063/1.5097699
