| Project/Area Number |
19H00645
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (A)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Review Section |
Medium-sized Section 13:Condensed matter physics and related fields
|
|---|
| Research Institution | Tohoku University |
|---|
Principal Investigator |
Bauer Gerrit 東北大学, 材料科学高等研究所, 教授 (10620213)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
佐藤 浩司 東北大学, 金属材料研究所, 助教 (70708114)
|
|---|
| Project Period (FY) |
2019-04-01 – 2024-03-31
|
| Project Status |
Completed (Fiscal Year 2024)
|
| Budget Amount *help |
¥44,980,000 (Direct Cost: ¥34,600,000、Indirect Cost: ¥10,380,000)
Fiscal Year 2023: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
Fiscal Year 2022: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
Fiscal Year 2021: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
Fiscal Year 2020: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
Fiscal Year 2019: ¥12,220,000 (Direct Cost: ¥9,400,000、Indirect Cost: ¥2,820,000)
|
|---|
| Keywords | Spintronics / magnonics / cavities / ferroelectriscs / yttrium iron garnet / ferroelectrics / Magnonics / Cavities / Ferroelectrics / Spintoronics / Photon Cavities |
|---|
| Outline of Research at the Start |
We propose an input-output scattering theory of a new form of matter, viz. a composite assembly of magnetic and other macroscopic objects in microwave cavities. Two sub-mm magnetic spheres in a cavity form a magnonic hydrogen molecule by virtual exchange of cavity photons. A magnonic heterochemistry invokes added superconducting and/or ferroelectric elements. The non-linear collective dynamics are quantized at low temperature, and can be read-out optically, electrically, and mechanically, allowing microwave, electric, and optical long-distance information exchange and order parameter control.
|
| Outline of Final Research Achievements |
Our research significantly advances our knowledge of magnons and spin transport by theoretical studies carried out in close collaboration with experimental groups. In FY2019 and 2020, we focused on hybrid quasiparticles such as magnon polaritons and magnon polarons with emphasis on their chirality and transport properties. In FY2021, we predicted that ferroelectric materials support previously unknown quasiparticles analog to magnons in magnetic materials, pioneering the new field of ferronics. From FY2022 to 2023, we explored the magnon chemistry of emerging materials and quantum effects. In FY2024, we clarified magnon behavior in p-bits and antiferromagnets and developed a theory for coherent spin transport in non-collinear magnetization textures.
|
| Academic Significance and Societal Importance of the Research Achievements |
Our research on magnon chemistry deepens the understanding of magnetic materials useful for applications in thermal management and low-power information technologies. The analogies between magnons and ferrons may lead to employment of ferroelectric devices in future sustainable electronics.
|
