2013 Fiscal Year Final Research Report
Enhancement of critical current density using assit pinning centers in high-Tc superconducting thin films with 1D pinning centers
| Project/Area Number |
23760288
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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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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| Project Period (FY) |
2011 – 2012
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| Keywords | 高温超伝導体 / 臨界電流密度 / ハイブリッド磁束ピンニング / 重イオン照射 / 擬似多層膜 / 1次元ピン / 3次元ピン |
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| Research Abstract |
BaZrO3/YBa2Cu3Oy quasi-multilayered films, in which the size and the spatial dirstribution of BaZrO3 nano-particles were controlled, were irradiated using 200 MeV Xe ions along the c-axis direction. When the BaZrO3 nano-particles were larger in size, the flux lines not captured by CDs, such as interstitial flux lines between CDs and double kinks of flux lines, can be pinned more effectively by the BaZrO3 nano-particles, so that the Jc enhances for high magnetic fields and high temperature. In addition, the inverse correlation between Jc and n-value appears at high temperature in increasing magnetic field for the film with correlated rows of the nano-particles which might be curved off the c-axis. These suggest that the hybrid flux pinning depends not only on the combination of one-dimensional (1D) and three-dimensional pinning centers (3D-PCs) but also on the size and the spatial distribution of the 3D-PCs.
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