섬유

preparation and properties of thin film yba/sub 2/cu/sub 3/o/sub x/ devices

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 411
low-noise yba/sub 2/cu/sub 3/o/sub x/ dc squids and flux transformers were fabricated by laser deposition. the josephson junctions were of grain boundary type, formed by epitaxial thin films, covering ar/sup +/ ion milled step edge substrates. the 5 mu m wide dc squids were patterned by a sio inhibit technique. the squid hole was varied between 5 mu m*10 mu m and 50 mu m*50 mu m, representing squid inductances between 20 ph and 140 ph. the optimum transfer function delta v/ delta phi at the appropriate flux bias was greater than 100 mu v/ phi o at 77 k for samples with 20 ph. the best value of the energy solution for samples with 20 ph is in /sub n,w/(f>30 hz)=6*10/sup -31/ j/hz in the white noise region and dc bias modulation
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