New structural aspects of Tl2Ba2CaCu2Oy epitaxial thin films grown by MOCVD on LaAlO3

X. F. Zhang, Y. S. Sung, D. J. Miller, B. J. Hinds, R. J. McNeely, D. L. Studebaker, Tobin J Marks

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The microstructure of a Tl2Ba2CaCu2Oy (Tl-2212) superconducting thin film grown by metal-organic chemical vapor deposition (MOCVD) on a pseudo-cubic (001) LaAlO3 substrate has been examined by analytical transmission electron microscopy (TEM) and high-resolution electron microscopy (HREM). Over large regions, the film is epitaxial and Tl-2212 phase is found to be the major phase. The film/substrate interface is abrupt and smooth on the atomic scale but a strain-field is induced by the lattice mismatch between the film and the substrate. In addition to the intrinsic modulation structure of the Tl-2212 phase, a very different modulation structure has also been found. The space group for the Tl-2212 phase in this thin film was determined to be I4mm rather than I4/mmm as usually reported. The loss of the (001) mirror plane is attributed to a defective Tl-2212 structure in which a considerable amount of Tl vacancies and Tl disorder occurred inhomogeneously in Tl-O layers. The reason for the Tl-deficiency is discussed.

Original languageEnglish
Pages (from-to)146-154
Number of pages9
JournalPhysica C: Superconductivity and its Applications
Volume275
Issue number1-2
Publication statusPublished - Feb 10 1997

Fingerprint

Organic Chemicals
Epitaxial films
Organic chemicals
metalorganic chemical vapor deposition
Chemical vapor deposition
Metals
Thin films
Substrates
thin films
Modulation
modulation
Superconducting films
Lattice mismatch
High resolution electron microscopy
Vacancies
electron microscopy
Mirrors
disorders
mirrors
Transmission electron microscopy

Keywords

  • Microstructure
  • TlBaCaCuO superconducting thin film

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Zhang, X. F., Sung, Y. S., Miller, D. J., Hinds, B. J., McNeely, R. J., Studebaker, D. L., & Marks, T. J. (1997). New structural aspects of Tl2Ba2CaCu2Oy epitaxial thin films grown by MOCVD on LaAlO3. Physica C: Superconductivity and its Applications, 275(1-2), 146-154.

New structural aspects of Tl2Ba2CaCu2Oy epitaxial thin films grown by MOCVD on LaAlO3. / Zhang, X. F.; Sung, Y. S.; Miller, D. J.; Hinds, B. J.; McNeely, R. J.; Studebaker, D. L.; Marks, Tobin J.

In: Physica C: Superconductivity and its Applications, Vol. 275, No. 1-2, 10.02.1997, p. 146-154.

Research output: Contribution to journalArticle

Zhang, XF, Sung, YS, Miller, DJ, Hinds, BJ, McNeely, RJ, Studebaker, DL & Marks, TJ 1997, 'New structural aspects of Tl2Ba2CaCu2Oy epitaxial thin films grown by MOCVD on LaAlO3', Physica C: Superconductivity and its Applications, vol. 275, no. 1-2, pp. 146-154.
Zhang XF, Sung YS, Miller DJ, Hinds BJ, McNeely RJ, Studebaker DL et al. New structural aspects of Tl2Ba2CaCu2Oy epitaxial thin films grown by MOCVD on LaAlO3. Physica C: Superconductivity and its Applications. 1997 Feb 10;275(1-2):146-154.
Zhang, X. F. ; Sung, Y. S. ; Miller, D. J. ; Hinds, B. J. ; McNeely, R. J. ; Studebaker, D. L. ; Marks, Tobin J. / New structural aspects of Tl2Ba2CaCu2Oy epitaxial thin films grown by MOCVD on LaAlO3. In: Physica C: Superconductivity and its Applications. 1997 ; Vol. 275, No. 1-2. pp. 146-154.
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