Improvement of critical current density using extended hybrid flux pinning structure in high-Tc superconducting thin films
| Project/Area Number |
25420292
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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 |
Electronic materials/Electric materials
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| Research Institution | Kumamoto University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
ISHIKAWA Norito 日本原子力研究開発機構, 原子力基礎工学研究部門, 研究主幹 (90354828)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | high-Tc superconductors / critical current density / flux pinning / ion irradiation / synergy effect / 高温超伝導体 / 臨界電流密度 / 磁束ピンニング / イオン照射 / 高臨界電流密度 / 重イオン照射欠陥 / 異方性改善 / 重イオン照射 / 1次元ピン / 照射欠陥 / ナノ構造制御 |
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| Outline of Final Research Achievements |
Hybrid flux pinning structures, which have the advantages of both linear defects and spherical ones, were tuned by using heavy ion irradiation defects and the influence of the structures on the angular dependence of Jc were systematically investigated in high-Tc superconducting thin films. In the case of the pinning structure consisting of discontinuous linear defects, the Jc was enhanced in a wider range of magnetic field orientations compared to continuous linear defects. This is because the feature of three dimensional pinning is provided for the discontinuous linear defects, which is just one of the hybrid flux pinning structures. For the pinning structure including both linear defects and spherical ones, a range of magnetic field orientations for the enhancement of Jc depended on the size of spherical defects. In addition, Jc around B || ab, which are generally reduced by introduction of linear defects, were improved by the control of the spatial distribution of spherical defects.
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Report
(4 results)
Research Products
(46 results)
