Title :
Influence of growth temperature and composition on structural disorder in YBCO thin films
Author :
Gibson, G. ; Humphreys, R.G. ; Cohen, L.F. ; MacManus-Driscoll, J.L.
Author_Institution :
Dept. of Mater., Imperial Coll. of Sci., Technol. & Med., London, UK
fDate :
6/1/1999 12:00:00 AM
Abstract :
Structural disorder has been measured using Raman spectroscopy for a series of films, which were grown by e-beam co-evaporation. The growth temperature and the cation stoichiometry of YBCO are essential parameters controlling the formation of structural disorder. Higher growth temperatures and higher Y fluxes produced more perfectly ordered films. Less spatial variation occurs in films with lower amounts of structural disorder.
Keywords :
Raman spectra; barium compounds; crystal structure; high-temperature superconductors; stoichiometry; superconducting thin films; yttrium compounds; Raman spectroscopy; YBCO thin films; YBa/sub 2/Cu/sub 3/O/sub 7/; cation stoichiometry; composition; e-beam co-evaporation; growth temperature; high temperature superconductor; structural disorder; Educational institutions; Electrical resistance measurement; Spectroscopy; Strain measurement; Substrates; Superconducting thin films; Surface resistance; Temperature; Transistors; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
