Formation of oriented high Tc superconducting Bi-Sr-Ca-Cu-O thin films on silver substrates by organometallic chemical vapor deposition

J. M. Zhang*, Bruce W Wessels, L. M. Tonge, Tobin Jay Marks

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

Highly oriented thin films of the high Tc Bi-Sr-Ca-Cu-O superconductor have been deposited on silver substrates by low-pressure organometallic chemical vapor deposition. The volatile metalorganic complexes Cu(acetylacetonate)2, Sr(dipivaloylmethanate)2, Ca(dipivaloylmethanate)2, and triphenyl bismuth are used as precursors with N2O as a reactant gas. X-ray diffraction measurements reveal that the films deposited at 625°C contain a mixture of the Bi 2(Sr,Ca)2CuOx and Bi2(Sr,Ca) 3Cu2Ox phases. The post-annealed films are predominantly composed of the Bi2(Sr,Ca)3Cu 2Ox phase with preferential orientation of the crystallite c axes perpendicular to the substrate surface. Magnetic susceptibility measurements indicate the superconducting onset temperature of the annealed films to be at 80 K. The zero-field critical current density, estimated from magnetization measurements, is ∼3.9×105 A/cm2 at 5.5 K.

Original languageEnglish (US)
Pages (from-to)976-978
Number of pages3
JournalApplied Physics Letters
Volume56
Issue number10
DOIs
StatePublished - Dec 1 1990

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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