A. Morimoto et al., LOW-TEMPERATURE GROWTH OF YBCO THIN-FILMS BY PULSED-LASER ABLATION INREDUCING ENVIRONMENT, Applied surface science, 129, 1998, pp. 963-967
Citations number
9
Categorie Soggetti
Physics, Applied","Physics, Condensed Matter","Chemistry Physical","Materials Science, Coatings & Films
The effect of ambient gas on the preparation of YBa2Cu3Ox (YBCO) high-
T-c superconducting thin films by pulsed laser ablation was explored i
n gas mixtures of argon + oxygen, argon + nitrous oxide, and nitrous o
xide + oxygen. These experiments revealed that a reducing environment
for the preparation of YBCO films enhances the film growth with the hi
gh temperature phase (trilayered perovskite YBCO) rather than the low
temperature phase (cubic YBCO). This phenomenon is explained in terms
of thermodynamic phase diagram. The effect of nitrous oxide on the the
rmodynamic phase diagram is far smaller than that of oxygen by a facto
r of two to three orders of magnitude. (C) 1998 Elsevier Science B.V.