ゾル-ゲル法によるAg添加NdBa_2Cu_3O_<7-δ>の合成と超伝導特性

概要

論文の詳細を見る
Ag-doped NdBa_2Cu_3O_<7-δ> superconducting ceramics were prepared by a sol-gel method. Ag was distributed uniformly in the sintered samples. The incongruent melting temperature of the NdBa_2Cu_3O_<7-δ> samples prepared by our sol-gel method was lower than that of the samples prepared by the conventional powder method. The incongruent melting temperature was further decreased by doping with Ag. The authors consider that the incongruent melting is induced by reaction between NdBa_2Cu_3O<7-δ> and Ag. The superconducting transition width ΔT(ΔT= T_<c(onset)> - T_<c(end)>) was decreased by doping with Ag. The electrical resistivity of a 10 mass% Ag-doped sample dropped sharply from 93 K (T_<c(onset)>) and showed zero resistivity at 86 K ( T_<c (end)>).
社団法人日本セラミックス協会の論文
1998-04-01