Oxide superconductor and method for manufacturing same
摘要
說(shuō)明書
Superconducting characteristics of oxide thin films 1F-low-Pr0.00Y1.00BCO, 1F-low-Pr0.10Y0.90BCO, 1F-high-Pr0.00Y1.00BCO, 1F-high-Pr0.10Y0.90BCO, 1F-high-Pr0.15Y0.85BCO, 1F-high-Pr0.20Y0.80BCO, and 1F-high-Pr0.22Y0.78BCO were each measured by an inductive method in liquid nitrogen under a self-magnetic field. In principle, the superconducting characteristics cannot be evaluated by the inductive method unless the superconductor exists in the region of about 6 mm in diameter in the superconducting film to be targeted. Therefore, the characteristics of only 4 to 6 points in the central portion can be obtained, but the highest value is the characteristic of the superconducting film. The obtained superconducting characteristics each were 6.77, 3.39, 6.81, 3.41, 1.72, 0.00, and 0.00 MA/cm2 (77 K, 0 T).
The measurement results of the superconducting characteristics by the inductive method were based on the result of the 5 times degradation phenomenon, in which the characteristics decreased by about 5 times the amount of Pr added. That is, when 10% of Pr was added, the characteristics were reduced by about 50%, and when 15% of Pr was added, the characteristics were reduced by 75%. It was found that almost the same characteristics were obtained regardless of whether the purity of praseodymium acetate was 98% or 99%, and that the deterioration in characteristics due to the 5 times degradation phenomenon was also almost the same. It was found that the characteristics of those with 20% and 22% of Pr could not be confirmed by the inductive method, and were non-superconducting.
