Study on Irradiation-induced Superconductivity

• Project/Area Number: 23656582
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Nuclear engineering
• Research Institution: Tohoku University
• Principal Investigator: KOSHIMIZU Masanori 東北大学, 大学院・工学研究科, 准教授 (40374962)
• Project Period (FY): 2011 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: 超伝導 / 放射線照射 / キャリアドープ / Ｘ線照射 / 放射線照射効果 / 光ドープ / 永続的光伝導

Research Abstract

We have found rise in critical temperature, as much as 15 K, in high-temperature oxide superconductors under X-ray irradiation. The mechanism of the rise is considered to be similar to that of photo-doping. Because penetration depth of ionizing radiation is much larger than visible photons, this technique can be applied to improving the properties of bulk superconductors.