• Superconducting Y-Ba-Cu-O films by rf sputtering in axial magnetic field

    • Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/014/02/0451-0455

    • Keywords

       

      Superconducting films; YBaCuO system; rf sputtering; backsputtering; growth; resistivity

    • Abstract

       

      Films of Y-Ba-Cu-O system have been prepared by rf sputtering from composite Y-Ba-Cu-O targets in an axial magnetic field in 4:1 Ar/O2 mixture on 〈100〉 SrTiO3 and 〈100〉 MgO substrates at 270°C and 450°C. Although back-sputtering caused due to negatively-charged oxygen ions was found to drastically vary the film composition about the centre of the sputtering axis, by properly orienting the substrates with respect to the sputtering axis near-stoichiometric films have been obtained. Films annealed at 900°C in oxygen have shown superconducting onset at 88°K and zero resistance transition at 72°K.

    • Author Affiliations

       

      R Pinto1 S P Pai1 L C Gupta1 2

      1. Solid State Electronics Group, Tata Institute of Fundamental Research, Homi Bhabha Road, Bombay - 400 005, India
      2. Solid State Physics Group, Tata Institute of Fundamental Research, Homi Bhabha Road, Bombay - 400 005, India
    • Dates

       
  • Bulletin of Materials Science | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2017-2019 Indian Academy of Sciences, Bengaluru.