Research on Upper Limits of Critical Temperature of Practical Superconductors by Solid-State Chemistry
| Project/Area Number |
19360293
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | The University of Tokyo |
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Principal Investigator |
SHIMOYAMA Jun-ichi The University of Tokyo, 大学院・工学系研究科, 准教授 (20251366)
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| Co-Investigator(Kenkyū-buntansha) |
KISHIO Kohji 東京大学, 大学院・工学系研究科, 教授 (50143392)
OGINO Hiraku 東京大学, 大学院・工学系研究科, 助教 (70359545)
HORII Shigeru 東京大学, 大学院・工学系研究科, 助教 (80323533)
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| Project Period (FY) |
2007 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥20,540,000 (Direct Cost: ¥15,800,000、Indirect Cost: ¥4,740,000)
Fiscal Year 2009: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2008: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2007: ¥13,650,000 (Direct Cost: ¥10,500,000、Indirect Cost: ¥3,150,000)
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| Keywords | 超伝導 / 化学組成 / 臨界温度 / 超伝導体 / 精密化学組成 / 臨界電流特性 / ドーピング |
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| Research Abstract |
Enhancement of critical temperatures (T_c) of practical superconductors with high T_c has been attempted by precise control of their chemical compositions. For Bi-based oxide superconductors, T_c of Bi(Pb)2223 tapes was successfully enhanced up to 116K with maintaining strong grain coupling. On the other hand, nonstoichiometry in cation compositions of Y123 and heavy-RE123 oxide was discovered. The cation nonstoichiometry was found to seriously degrade superconducting properties, such as T_c and critical current properties. This new knowledge gave a new guideline to develop high performance materials.
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Report
(4 results)
Research Products
(35 results)
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[Presentation] Cation Nonstoichiometry of Y1232009
Author(s)
J. Shimoyama. H. Kaku, H. Ogino, S. Horii, K. Kishio
Organizer
9th International Conference on Materials and Mechanisms of Superconductivity
Place of Presentation
東京
Year and Date
2009-09-08
Related Report
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[Presentation] Cation Nonstoichiometry of Y1232009
Author(s)
J.Shimoyama. H.Kaku, H.Ogino, S.Horii, K.Kishio
Organizer
9th International Conference on Materials and Mechanisms of Superconductivity
Place of Presentation
東京、新宿 京王プラザホテル
Year and Date
2009-09-08
Related Report
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[Presentation] Y123における金属不定比性2009
Author(s)
下山淳一, 加來宏一, 佐藤伸也, 石井悠衣, 山崎裕也, 荻野拓, 堀井滋, 岸尾光二
Organizer
2009年春季応用物理学会
Place of Presentation
つくば
Year and Date
2009-03-31
Related Report
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