섬유

x-ray photoelectron spectroscopy analysis of y-ba-cu-o surface barrier for superconducting junctions

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 374
fabrication of junctions with a y-ba-cu-o/barrier/y-ba-cu-o trilayered structure is attempted. the barrier layer is formed by cf/sub 4/ plasma treatment. a nonlinear structure is observed in the current-voltage curve of the junction, but the josephson current is not detected. the y-ba-cu-o films before and after cf/sub 4/ plasma treatment are investigated by x-ray photoelectron spectroscopy to clarify the junction's structure. compositional deviation is detected at the surface layer of the y-ba-cu-o films. of the cf/sub 4/ plasma treatment effects, fluorination of yttrium and reduction of copper are observed
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