Superconducting thin films of Bi-Pb-Sr-Ca-Cu-O synthesized by the spray-inductively coupled plasma technique

M. Suzuki, M. Kagawa, Y. Syono, T. Hirai, K. Watanabe

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Superconducting thin films of Bi-Pb-Sr-Ca-Cu-O were synthesized on polycrystalline MgO substrates by injecting atomized aqueous solutions of appropriate nitrates into an inductively coupled r.f. plasma (ICP) under atmospheric pressure (the spray-ICP technique). 1-2 μm thick films composed of c-axis oriented phases (c=2.4 and 3.0 nm) could be synthesized in runs of 15-20 min. The phase compositions of the films were varied from c=2.4 nm phase to c=3.0 nm phase through their mixed phases by increasing the distance of the substrates from the ICP. In some cases the mixed phases contained a small amount of c=3.7 nm phase. Annealing in air (850 °C for 10 min and then 800 °C for 5 h) converted c=2.4 nm phase to c=3.0 nm phase. The best as-deposited film showed Tc (resistance = 0) at 55 K, and after annealing its resistance began to drop around 110 K and reached zero at 75 K.

Original languageEnglish
Pages (from-to)5929-5932
Number of pages4
JournalJournal of Materials Science
Volume26
Issue number21
DOIs
Publication statusPublished - 1991 Nov 1

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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