Growth and superconducting properties of Pb1?yBiySr2Y1?xCaxCu2O7+δ epitaxial films

11th European Conference on Applied Superconductivity

Komori, Sachio^1 ; Inaba, Ryotaro^1 ; Kakeya, Itsuhiro^1 ; Suzuki, Minoru^1

Department of Electronic Science and Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan^1

关键词: Ex situ;    Onset temperature;    Single crystal thin films;    Superconducting properties;    Superconducting transitions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/507/1/012025/pdf
DOI  :  10.1088/1742-6596/507/1/012025

来源: IOP

【 摘 要 】

Pb1-yBiySr2Y1-xCaxCu2O7+δ (PbBi1212) single-crystal thin films have been grown on SrTiO3(100) substrates by the ex-situ growth method in which an amorphous film is annealed at 970 °C in a closed ceramic container made of the same material as the film. It is found that PbBi1212 exhibits superconductivity when the Ca concentration x is greater than 0.3. It is also found that a quench into liquid nitrogen from 815 °C is required for the films to exhibit the superconductivity. The highest onset temperature of the superconducting transition attained in the present study is 65 K.