Efficient route to TIBa2Ca2Cu3O9+x thin films by metal-organic chemical vapor deposition using TIF as a thallination source

R. J. McNeely, J. A. Belot, B. J. Hinds, T. J. Marks*, J. L. Schindler, M. P. Chudzik, C. R. Kannewurf, X. F. Zhang, D. J. Miller

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Thin TlBa2Ca2Cu3O9+x. films were grown on single crystal (110) LaAlO3 from metal-organic chemical-vapor deposition-derived Ba-Ca-Cu-Ox precursor films employing Ba(hfa)2·mep, Ca(hfa)2·tet, and Cu(dpm)2 (hfa=hexafluoroacetylacetonate; dpm=dipivaloylmethanate; tet=tetraglyme; mep=methylethylpentaglyme) as the volatile metal sources. Thallination is then accomplished by annealing the precursor films in the presence of a bulk BaO+CaO+CuO+TlF source at 885°C in flowing O2. The presence of TlF is essential for nucleating the Tl-1223 phase. The resulting Tl-1223 films are nearly phase-pure, highly oriented, epitaxial by x-ray diffraction, and contain negligible fluoride by windowless energy-dispersive x-ray measurements. The films exhibit a transport measured Tc = 103 K and Jc = 4.4 × 104 A/cm2 (77 K, 0 T). Magnetic hysteresis measurements yield Jc = 1.9 × 105 A/cm2 (30 K, 0.01 T) and show considerable flux pinning at low temperatures with Jc = 1.4 × 105 A/cm2 (5 K, 4.5 T).

Original languageEnglish (US)
Pages (from-to)1243-1245
Number of pages3
JournalApplied Physics Letters
Volume71
Issue number9
DOIs
StatePublished - Sep 1 1997

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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