| Project/Area Number |
24560021
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Applied materials science/Crystal engineering
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
OOI Shuuichi 独立行政法人物質・材料研究機構, 超伝導物性ユニット, 主任研究員 (10354292)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2014: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
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| Keywords | 渦糸状態制御 / 電流注入ドーピング / 局所陽極酸化加工 / Bi系銅酸化物超伝導体 / 高温超伝導体 / Bi2212 / ナノ加工 / 超伝導性制御 / 渦糸 / 高温超伝導薄膜 / 局所陽極酸化 / 固有ジョセフソン接合 / 高温超伝導 / 渦糸状態 |
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| Outline of Final Research Achievements |
Nanofabrication of high quality thin-film crystals of Bi2212 was tested by using a moisture-controlled AFM. While somewhat degradation on the Bi2212 surface over time in hours disturbed reproducibility of the stable fabrication due to an increase of the electrical resistance between the surface and a conductive probe, another fabrication method, scratches by a diamond probe, worked well and succeeded to make a ~100 nm trench on Bi2212 surfaces. On the other hand, as to control of a doping level of intrinsic Josephson junctions by the c-axis current injections, its reproducibility and the junction-number dependence were investigated. Using the current injection doping method, vortex phase boundary of the melting transition could be successfully controlled via a change of the anisotropy. Additionally, an oscillating behavior of the melting transition line was discovered in a vortex system containing small number of vortices.
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