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Large spin-orbit torque observed in epitaxial SrIrO3 thin films
- Source :
- Applied Physics Letters. 114:232406
- Publication Year :
- 2019
- Publisher :
- AIP Publishing, 2019.
-
Abstract
- 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.
- Subjects :
- 010302 applied physics
Spin pumping
Materials science
Chemical substance
Physics and Astronomy (miscellaneous)
Condensed matter physics
02 engineering and technology
021001 nanoscience & nanotechnology
Epitaxy
01 natural sciences
Transition metal
Ferromagnetism
Sputtering
0103 physical sciences
Thin film
0210 nano-technology
Spin-½
Subjects
Details
- ISSN :
- 10773118 and 00036951
- Volume :
- 114
- Database :
- OpenAIRE
- Journal :
- Applied Physics Letters
- Accession number :
- edsair.doi...........a84e60959d88489ea073b4c2c180735e