| 研究課題/領域番号 |
23KF0139
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| 研究種目 |
特別研究員奨励費
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| 配分区分 | 基金 |
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| 応募区分 | 外国 |
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| 審査区分 |
小区分21050:電気電子材料工学関連
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| 研究機関 | 東京大学 |
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研究代表者 |
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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| 研究分担者 |
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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| 研究期間 (年度) |
2023-09-27 – 2026-03-31
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| 研究課題ステータス |
交付 (2023年度)
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| 配分額 *注記 |
2,300千円 (直接経費: 2,300千円)
2025年度: 400千円 (直接経費: 400千円)
2024年度: 1,000千円 (直接経費: 1,000千円)
2023年度: 900千円 (直接経費: 900千円)
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| キーワード | Magnonics / Spin-glass / Field-cooling / neuromorphic computing |
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| 研究開始時の研究の概要 |
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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| 研究実績の概要 |
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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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
The research progress is going according to the plan and the proposed time frame.
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| 今後の研究の推進方策 |
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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