METHOD FOR IMPROVING THE SURFACE SMOOTHNESS, THE CRYSTAL STRUCTURE AND THE MICROWAVE SURFACE RESISTANCE OF YBa2Cu3O7- delta HIGH-TEMPERATURE SUPERCONDUCTOR FILMS GROWN ON CeO2-BUFFERED r-CUT SAPPHIRE SUBSTRATES

摘要

The invention comprises post-annealing of CeO2-buffered r-cut sapphire substrate at a temperature range of 960 - 1050 DEG C and growing high temperature superconductor YBa2Cu3O7- delta films on the post-annealed CeO2-buffered r-cut sapphire substrate.