Effect of Intermission in Layer-by-Layer Growth of Bi₂Sr₂Ca₂Cu₃O_10+δ Thin Films on Nd:YAlO₃(001)

Abstract

The intermission-time dependence of crystal structures and superconductivity has been investigated for Bi 2 Sr 2 Ca 2 Cu 3 O 10+δ thin films. To stimulate surface migration of Cu atoms, an intermission has been inserted just after the deposition of Cu. The effect of the intermission appears in the low-angle X-ray diffraction and the transition temperature. It is found that the intermission improves the quality of the films, but a too-long intermission is bad for their superconductivity. The film prepared with the 30-s intermission shows an untwinned structure on the Nd:YAlO 3 (001) substrate and has the transition temperature at 82 K.