Formation and superconducting properties of As grown Bi-Ca-Sr-Cu-O films by AC sputtering

H. C. Yang, H. C. Chen, H. E. Horng, J. C. Yu

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Abstract

The authors have in situ grown Bi-Ca-Sr-Cu-O films by ac sputtering. The substrates were heated to 630-670 degrees C during ac sputtering. The sputtering was first carried out in a mixture of Ar(70%) and O2(30%) at a pressure of 0.2 mbar. Then the mixture of Ar(70%) and O2(30%) was replaced by pure O2 and the sputtering was kept for another one hour. Superconducting Bi2CaSr2Cu2Oy (2122) films with zero resistance at 70-75 K can be reproduced. The critical fields of the as grown films parallel to c-axis and ab-plane has been measured. The estimated zero temperature coherence lengths are zeta c=3.3 AA and zeta ab=36.1 AA respectively for the (2122) phase.

Original languageEnglish
Article number114
Pages (from-to)S385-S387
JournalSuperconductor Science and Technology
Volume4
Issue number1 S
DOIs
Publication statusPublished - 1991 Dec 1

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ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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