| Budget Amount *help |
¥24,050,000 (Direct Cost: ¥18,500,000、Indirect Cost: ¥5,550,000)
Fiscal Year 2019: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2018: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000)
Fiscal Year 2017: ¥11,180,000 (Direct Cost: ¥8,600,000、Indirect Cost: ¥2,580,000)
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| Outline of Final Research Achievements |
We investigated the effect of low-energy ion irradiation on superconducting properties and microstructures in iron-chalcogenide FeSe0.5Te0.5 (FST) thin films and high-temperature superconducting YBa2Cu3Oy (YBCO) thin films. A clear enhancement in the Jc was observed upon 6 MeV Au-ion irradiation with 1×1012 Au cm-2 dose for all field orientations at 4.2 K in FST films. Moreover, a nearly 70% increase in Jc has been achieved at a magnetic field of 9 T applied parallel to the crystallographic c axis at 10 K with little reduction of Tc. In the case of YBCO films, we found that the 10 MeV Au-ion irradiation yielded up to about 40% Jc increase in the magnetic field over 4 T. These results indicate that low-energy ion irradiation could be effective technique to enhance Jc under magnetic fields.
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