2014 Fiscal Year Final Research Report
Development of spin-current physics based on spin-lattice hybrid dynamics
| Project/Area Number |
25707029
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (A)
|
| Allocation Type | Partial Multi-year Fund |
|---|
| Research Field |
Condensed matter physics II
|
|---|
| Research Institution | Tohoku University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2013-04-01 – 2015-03-31
|
| Keywords | スピン流 / 音波 / フォノン / 逆スピンホール効果 / スピンゼーベック効果 / 磁性体 |
|---|
| 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.
|
| Free Research Field |
スピントロニクス
|
