2015 Fiscal Year Final Research Report
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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| Keywords | high-Tc superconductors / critical current density / flux pinning / ion irradiation / synergy effect |
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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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| Free Research Field |
電子物性工学
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