Growth of thin films of the defect perovskite LaCuO3-δ by Pulsed Laser Deposition

A. Gupta, B. W. Hussey, A. M. Guloy, T. M. Shaw, R. F. Saraf, J. F. Bringley, B. A. Scott

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Oriented thin films of the defect perovskite LaCuO3-δ (LCO) have been grown on (100) SrTiO3 substrates by pulsed laser deposition. The orthorhombic, oxygen-deficient La2Cu2O5 (δ = 0.5) phase, which is the end-member of the perovskite series, is formed at a growth temperature of 700°C under 200 mTorr background O2 pressure. With additional oxygen uptake during cooldown, the orthorhombic phase can be easily converted to the monoclinic modification (δ ≤ 0.4). The more highly oxygenated tetragonal phase (δ ≤ 0.2) is, however, not obtained for background O2 pressures up to 760 Torr. Partial conversion to the tetragonal phase has been achieved by postannealing the films at 600-650°C under high oxygen pressure (450 bar). From resistivity measurements, a distinct insulator-metal transition is observed in going from the orthorhombic to the monoclinic structure, with postannealed films containing the mixed tetragonal and monoclinic phases showing the lowest resistivity. However, no evidence of superconductivity has been detected in any of the films down to 5 K.

Original languageEnglish (US)
Pages (from-to)202-206
Number of pages5
JournalJournal of Solid State Chemistry
Volume108
Issue number1
DOIs
StatePublished - Jan 1994

Fingerprint

Pulsed laser deposition
Perovskite
pulsed laser deposition
Oxygen
Thin films
Defects
defects
thin films
high pressure oxygen
electrical resistivity
Metal insulator transition
Growth temperature
oxygen
Superconductivity
superconductivity
transition metals
insulators
Substrates
perovskite
temperature

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Gupta, A., Hussey, B. W., Guloy, A. M., Shaw, T. M., Saraf, R. F., Bringley, J. F., & Scott, B. A. (1994). Growth of thin films of the defect perovskite LaCuO3-δ by Pulsed Laser Deposition. Journal of Solid State Chemistry, 108(1), 202-206. https://doi.org/10.1006/jssc.1994.1032

Growth of thin films of the defect perovskite LaCuO3-δ by Pulsed Laser Deposition. / Gupta, A.; Hussey, B. W.; Guloy, A. M.; Shaw, T. M.; Saraf, R. F.; Bringley, J. F.; Scott, B. A.

In: Journal of Solid State Chemistry, Vol. 108, No. 1, 01.1994, p. 202-206.

Research output: Contribution to journalArticle

Gupta, A, Hussey, BW, Guloy, AM, Shaw, TM, Saraf, RF, Bringley, JF & Scott, BA 1994, 'Growth of thin films of the defect perovskite LaCuO3-δ by Pulsed Laser Deposition', Journal of Solid State Chemistry, vol. 108, no. 1, pp. 202-206. https://doi.org/10.1006/jssc.1994.1032
Gupta, A. ; Hussey, B. W. ; Guloy, A. M. ; Shaw, T. M. ; Saraf, R. F. ; Bringley, J. F. ; Scott, B. A. / Growth of thin films of the defect perovskite LaCuO3-δ by Pulsed Laser Deposition. In: Journal of Solid State Chemistry. 1994 ; Vol. 108, No. 1. pp. 202-206.
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