| 研究課題/領域番号 |
23KF0139
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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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| キーワード | Magnonics / Spin-glass / Field-cooling / neuromorphic computing |
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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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| 次年度使用額が生じた理由 |
経費削減により予定より実験等にかかる費用が少なくできた。
Next Fiscal Year Usage Plan: The spin-glass thin films with a controlled frustrated state will be optimized. Two approaches will be followed.
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