| 研究課題/領域番号 |
20K05297
|
|---|
| 研究種目 |
基盤研究(C)
|
| 配分区分 | 基金 |
|---|
| 応募区分 | 一般 |
|---|
| 審査区分 |
小区分29010:応用物性関連
|
|---|
| 研究機関 | 東北大学 |
|---|
研究代表者 |
RAMOS Rafael 東北大学, 材料科学高等研究所, 助教 (40839312)
|
|---|
| 研究期間 (年度) |
2020-04-01 – 2021-03-31
|
| 研究課題ステータス |
中途終了 (2020年度)
|
| 配分額 *注記 |
4,420千円 (直接経費: 3,400千円、間接経費: 1,020千円)
2022年度: 650千円 (直接経費: 500千円、間接経費: 150千円)
2021年度: 1,170千円 (直接経費: 900千円、間接経費: 270千円)
2020年度: 2,600千円 (直接経費: 2,000千円、間接経費: 600千円)
|
|---|
| キーワード | Spintronics / Magnons / Phonons / spin Seebeck / magnetic compensation / Spin Caloritronics / Thermoelectricity / Magnetic materials / Magnetic oxides |
|---|
| 研究開始時の研究の概要 |
Heat driven spin transport in insulating materials, the spin Seebeck effect (SSE), offers the possibility for energy conversion and information transport with lower dissipation losses, but the small magnitude limits its potential for applications. Recently, the spin-lattice interaction has been found to improve the SSE conversion efficiency due to magnon-phonon hybridization. As a result of this and other discoveries, there is a growing interest in spin-lattice interaction effects, having the potential for improved spin transport properties and possibly magnetic field control of heat flow.
|
| 研究実績の概要 |
The project deals with the investigation of spin-lattice interaction effects in magnetic insulators, in particular the effect of magnetic compensation on spin-heat conversion (spin Seebeck effect: SSE) in Ga-substituted yttrium iron garnet (Ga-YIG), with increasing Ga-substitution the magnetic compensation increases.
I optimized the growth of high-quality Ga-YIG by liquid phase epitaxy, the structural quality was confirmed by x-ray diffraction. The presence of peaks in the SSE voltage at lower magnetic field than in YIG confirm the larger compensation and high magnetic quality of the films.
Further spin transport studies on the grown films are to be performed to investigate the role of magnetic compensation on magnon-phonon hybridization and its effect on the spin-heat conversion properties.
|
