[12a-N402-1~11] 11.2 Thin and thick superconducting films, coated conductors and film crystal growth

[12a-N402-4] Effects of introduced stacking faults under low PH₂O for fluorine-free MOD processed

〇Rio Kanaizumi¹, Takanori Motoki¹, Yuta Segawa¹, Eisuke Osaki¹, Shin-ichi Nakamura², Genki Honda³, Tatsuoki Nagaishi³, Shin-ichi Kobayashi³, Jun-ichi Shimoyama¹ (1.Aoyama-Gakuin Univ., 2.TEP, 3.Sumitomo Electric Industries, Ltd)

Keywords:superconductivity, thin film

We have reported that the stacking faults in YBa₂Cu₃O_y(Y123) superconducting thin films prepared by fluorine-free MOD method can be controlled to a relatively low concentration by annealing in a water vapor containing atmosphere below 200°C. The faults concentration can be controlled by controlling the annealing conditions and additional oxygen annealing. In this study, we report the control of stacking faults. In the present study, the amount and distribution of stacking faults were controlled by annealing the prepared Y123 thin films in a water vapor atmosphere with controlled water vapor partial pressure, aiming at an essential understanding of the formation mechanism and its effect on the superconducting properties.