| Project/Area Number |
16K13659
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Applied materials
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| Research Institution | Yamagata University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
山田 博信 山形大学, 大学院理工学研究科, 助教 (50400411)
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| Project Period (FY) |
2016-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | テラヘルツ波 / 超伝導 / 検出器 / 高温超伝導体 / テラヘルツ / 超伝導材料・素子 |
|---|
| Outline of Final Research Achievements |
Bismuth Cuprate High-Tc superconductors (Bi-HTS) reveal a peculiar RF response just below the superconducting transition temperature. In this research, we studied response mechanism and developing high quality nm-thick Bi-HTS thin films required for bolometer aiming at applying this to terahertz sensitive bolometers operating at 77K. We choose Neodymium Gallate (NGO: NdGaO3) as favorable substrates for epitaxial growth by Metal Organic Decomposition (MOD) method with low dielectric loss and good transparency in the terahertz wave range. At the first we encountered a serious problem that Ga ion diffused in Bi-HTS and totally inhibited its superconductivity. By using the non-superconducting Bi-HTS film as a self-buffer layer to overcome the problem, we succeeded to have epitaxially grown quality 10nm-thick Bi-HTS thin films exhibiting superconducting transition at 75K.
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