| 研究課題/領域番号 |
23K13376
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| 研究機関 | 名古屋大学 |
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研究代表者 |
李 峰 名古屋大学, 工学研究科, 特任助教 (00888381)
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| 研究期間 (年度) |
2023-04-01 – 2025-03-31
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| キーワード | Josephson junction / π-JJ / giant inductance / negative inductance / SFQ circuit |
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| 研究実績の概要 |
The negative inductance of ferromagnetic Josephson junction (π-JJ) has been confirmed with a negative circulating current in the superconducting quantum interference device composed of π-JJ and superconducting loop. The effect of the screening parameter βL on the design of the superconducting giant inductance device was verified in experiment. To meet the requirement of the screening parameter, superconductor/ferromagnet/insulator/superconductor (SFIS)π-JJ has been adopted to design the giant inductance device. Single flux quantum (SFQ) Ring-oscillator with giant inductance devices has been designed and fabricated, however, the effective inductance has not been extracted at present.
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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 design methodology of the superconducting giant inductance device has been established and the device or circuit fabrication process has also been developed.
The next step is to optimize the fabrication process to make sure the fabricated device or circuits meet the reqirement and test the effective inductance as planed.
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| 今後の研究の推進方策 |
1.Mainly focuse on the developement of giant inductance device on superconductor/ferromagnet/insulator/superconductor (SFIS)π-JJ.
2.Optimizing the fabrication of SFIS JJ further to obtain a much more stable critical current density.
3.To design SFQ circuits with different giant inductance devices to mitigate the influence of the parameters deviation on the effectiveness of the giant inductance device.
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| 次年度使用額が生じた理由 |
1. Liquid Helium and photomasks are required to carry out the related experiment;
2. The traveling fee is needed to report the achievements during international and dometic conferences;
3. Some money will be used to cover the fee related to paper publication;
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