Deposition of high-temperature superconducting thin films on metallic and nometallic substrates by laser ablation.

摘要

This dissertation covers my research in four steps: basic understanding of the theory of superconductors, development of the experimental setup, deposition of high temperature superconducting thin films (HTSTF) on metallic and nonmetallic substrates by laser ablation, and characterization HTSTFs on metallic and nonmetallic substrates.;High quality HTSTFs have been grown on metallic and nonmetallic substrates, including SrTiO;Analysis of the film compositions and structures have been made using XRD, EDAX, SEM, and AFM. STM, AFM, and high-magnification SEM images of the YBCO films on Cu show random orientation and rough surface relative to similar films on SrTiO