Combinatorial investigation of spin-orbit materials using spin Peltier effect
Open Access
- 30 October 2018
- journal article
- research article
- Published by Springer Science and Business Media LLC in Scientific Reports
- Vol. 8 (1), 1-7
- https://doi.org/10.1038/s41598-018-34493-6
Abstract
Conversion between spin and charge currents is essential in spintronics, since it enables spin-orbit-torque magnetization switching, spin-current-driven thermoelectric generation, and nano-scale thermal energy control. To realize efficient spin-charge conversion, a variety of mechanisms, including spin Hall effects, Rashba-Edelstein effects, and spin-momentum locking in topological insulators, have been investigated and more comprehensive material exploration is necessary. Here we demonstrate high-throughput screening of spin-charge conversion materials by means of the spin Peltier effect (SPE). This is enabled by combining recently-developed SPE-imaging techniques with combinatorial materials science; using a composition-spread alloy film formed on a magnetic insulator, we observe the SPE-induced temperature change due to the spin Hall effect and obtain a continuous mapping of its composition dependence from the single sample. The distribution of the SPE signals reflects local spin-charge conversion capability in the alloy owing to unique heat-generation nature of the SPE. This combinatorial approach will accelerate materials research towards high-performance spintronic devices.Keywords
Funding Information
- Japan Science and Technology Agency (JPMJCR17I1, JPMJPR12C1, JPMJCR16Q5, JPMJPR17R5, JPMJER1402, JPMJCR16Q5)
- Japan Society for the Promotion of Science (JP15H02012, JP18H05246, JP15H02012)
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