| Project/Area Number |
23KF0139
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| Research Category |
Grant-in-Aid for JSPS Fellows
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| Allocation Type | Multi-year Fund |
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| Section | 外国 |
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| Review Section |
Basic Section 21050:Electric and electronic materials-related
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| Research Institution | The University of Tokyo |
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Principal Investigator |
田畑 仁 東京大学, 大学院工学系研究科(工学部), 教授 (00263319)
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| Co-Investigator(Kenkyū-buntansha) |
SARKER MD SHAMIM 東京大学, 大学院工学系研究科(工学部), 外国人特別研究員
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| Project Period (FY) |
2023-09-27 – 2026-03-31
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| Project Status |
Granted (Fiscal Year 2023)
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| Budget Amount *help |
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2025: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 2024: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2023: ¥900,000 (Direct Cost: ¥900,000)
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| Keywords | Magnonics / Spin-glass / Field-cooling / neuromorphic computing |
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| Outline of Research at the Start |
I plan to investigate the Spinglass systems to correlate the frustration order with glass transition temperature and spin relaxation via growth control towards neuromorphic computation. The plan involves MCD, PPMS, Lithography, and microwave systems in conjunction with VNA for characterization.
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| Outline of Annual Research Achievements |
The purpose of this research is to use the exotic quantum state of electron spin for next-generation information processing. I am investigating spin-glass materials that can remember their magnetization state for neuromorphic computation. Presently, I am investigating different rare-earth doped yttrium iron garnet films to achieve glassy behavior, keeping the magnetic damping as low as possible. I found the YIG thin films fabricated on the lattice-mismatched substrate show glass-like bifurcation properties. I am trying to figure out the underlying mechanism of this glassy behavior. In addition to that, I am also working on Rare earth and transition metal doped YIG film to control the glass transition temperature. I observed a magnetization compensation behavior in in the M-T curve in Gd-doped YIG.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
The research progress is going according to the plan and the proposed time frame.
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| Strategy for Future Research Activity |
In the near future, the spin-glass thin films with a controlled frustrated state will be optimized. Two approaches will be followed. The first one is based on order control using layer-by-layer deposition, whereas the second approach will be based on nanostructuring and annealing. I will try to find a correlation between the frustration order and the glass transition temperature of the spin glass material. The feasibility of using each frustration site as a quantum object will be investigated. The characterization will be conducted using MCD, PPMS, and microwave arrangement in conjunction with a vector network analyzer.
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