• DocumentCode
    1476630
  • Title

    Noise properties of YBa2Cu3O7-x step-edge junction dc SQUID magnetometers prepared on sapphire substrates

  • Author

    Lim, Hae-Ryong ; Kim, In-Seon ; Park, Yong Ki ; Kim, Dong Ho

  • Author_Institution
    Korea Res. Inst. of Standard Sci., Taejon, South Korea
  • Volume
    11
  • Issue
    1
  • fYear
    2001
  • fDate
    3/1/2001 12:00:00 AM
  • Firstpage
    1355
  • Lastpage
    1358
  • Abstract
    Step-edge YBa2Cu3O7-x (YBCO) dc SQUID magnetometers on sapphire substrates have been fabricated. CeO2 buffer layers and YBCO films were deposited in situ on the low angle (~35°) steps formed on the sapphire substrates with various thickness ratio of YBCO thin film to step height. Noise properties of the magnetometer exhibit quite different behavior according to the thickness ratio. The field noise of the dc SQUID magnetometer was measured to be 100~300 fT/√Hz at 100 Hz and about 1.5 pT/√Hz at 1 Hz with a dc bias method, and 450 fT/√Hz at 1 Hz with an ac bias method
  • Keywords
    SQUID magnetometers; barium compounds; high-temperature superconductors; pulsed laser deposition; superconducting device noise; superconducting thin films; yttrium compounds; 1 Hz; 100 Hz; Al2O3; CeO2; CeO2 buffer layers; YBa2Cu3O7-x step-edge junction dc SQUID magnetometers; YBa2Cu3O7; ac bias method; dc bias method; field noise; film thickness ratio; in situ deposition; low angle steps; noise properties; pulsed laser deposition; sapphire substrates; step height; Buffer layers; Fabrication; Gold; Josephson junctions; Magnetic properties; Milling; SQUID magnetometers; Substrates; Transistors; Yttrium barium copper oxide;
  • fLanguage
    English
  • Journal_Title
    Applied Superconductivity, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    1051-8223
  • Type

    jour

  • DOI
    10.1109/77.919602
  • Filename
    919602
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1476630