THIN-FILM DEPOSITION OF YTTRIUM AND DYSPROSIUM ON YTTRIA-STABILIZED ZIRCONIA AND STRONTIUM-TITANATE SUBSTRATES WITH BUFFER LAYERS

The deposition of yttrium and dysprosium on yttria-stabilized zirconia and strontium titanate single crystal [100] substrates with buffer la yers of Cu, Y2O3, and BaOx has been investigated. The ESCA and XRD mea surements carried out on films grown at substrate temperatures between 200 and 550 degrees C show that all the buffer layers studied permit the oxygen uptake by Y and Dy from the substrates thus forming Y2O3 an d Dy2O3. This is an important result from the point of view of the pre paration of thin films of high temperature superconductors and related multilayer structures under controlled conditions.