| Budget Amount *help |
¥26,650,000 (Direct Cost: ¥20,500,000、Indirect Cost: ¥6,150,000)
Fiscal Year 2014: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2013: ¥20,150,000 (Direct Cost: ¥15,500,000、Indirect Cost: ¥4,650,000)
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| Outline of Final Research Achievements |
The acoustic spin pumping refers to the generation of spin currents by sound waves. In this research, we investigated the physics of the interaction between spin and lattice dynamics by measuring the acoustic spin pumping systematically. Here, we proposed and demonstrated novel methods for the pure detection and quantitative evaluation of the sound-wave-driven spin currents, which enable the separation of the acoustic spin pumping from the spin Seebeck effect. We also explored the temperature and magnetic field dependences of the spin Seebeck effect in the devices used for measuring the acoustic spin pumping in detail, and found important clues to a comprehensive understanding of the mechanisms for generating spin currents by heat currents and sound waves.
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