Material design for a stable fabrication of long-scale high-Tc superconducting cables with high performances

2015 Fiscal Year Final Research Report

• Project/Area Number: 25820335
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Inorganic materials/Physical properties
• Research Institution: Doshisha University (2014-2015); Tohoku University (2013)
• Principal Investigator: HARUTA Masakazu 同志社大学, 研究開発推進機構, 准教授 (90580605)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 酸化物薄膜 / 希土類系高温超伝導体 / 超伝導薄膜 / 臨界電流特性 / 結晶欠陥 / ナノロッド / パルスレーザ堆積 / 薄膜電池

Outline of Final Research Achievements

Introduction of nanorods as a secondary phase is useful to improve current carrying performances for rare-earth based high-Tc superconducting cables. However, performances of superconducting films with nanorods are strongly depended on the film fabrication temperature (substrate temperature, Ts). Relationships with current carrying performances and nanorod morphology were investigated among superconducting films with three different nanorods prepared with various substrate temperatures. Moreover, effects of decrement of the superconducting transition temperature due to the nanorod introduction on the current carrying performances were also investigated. Availability of using a mixture of rare-earth elements, Y and Er, as a superconducting matrix was demonstrated to achieve a uniform current carrying performance for superconducting films with nanorods prepared in a wide Ts-range.

Free Research Field

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