Microstructure of epitaxial YbBa₂Cu₃O₇ superconducting films grown by a new liquid-gas-solidification technique

Authors

C.H. Chen, AT&T Bell Laboratories, Murray Hill, New Jersey
H.S. Chen, AT&T Bell Laboratories, Murray Hill, New Jersey
Sy_Hwang Liou, University of Nebraska-LincolnFollow

Date of this Version

December 1988

Comments

Published by American Institute of Physics. Appl. Phys. Lett. 53, 2339 (1988). ©1988 American Institute of Physics. Permission to use. Journal home page = http://jap.aip.org/jap/.

Abstract

We have studied the microstructures of epitaxial YbBa₂Cu₃O₇ superconducting films grown on SrTiO₃ [100] and [110] substrates by a new liquid-gas-solidification processing technique. Films grown on SrTiO₃ [100] and [110] substrates are epitaxially oriented with [001] and [110] axes normal to the film surface. Twinned domains of ~200 Å in size are observed in the [001] oriented films. Most defects observed can be attributed to the presence of stacking faults along the c axis. The presence of Cu-O bilayer defects is also observed. Rapid oxygen diffusion in the liquid phase is found to play an important role in the microstructure of the thin films.