Preparation of high-T/sub c/ Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-delta/ superconducting thin films by MBE (Molecular-Beam-Epitaxy) techniques

We report here the fabrication of high temperature superconducting thin films of Ya-Ba-Cu-O by metal Molecular-Beam-Epitaxy technique. X-ray analysis of the films grown on SrTiO/sub 3/(100) substrate indicates a preferred orientation with a-axis normal to the surface. Raman scattering was used as an effective tool in the determination of the oxygen stoichiometry and impurity phases in these Y-Ba-Cu-O thin films. 7 refs., 4 figs.