Properties of Nb-doped lead scandium niobate titanate thin films prepared by a sol-gel method

C. R. Cho, D. E. Drinkwater, L. F. Francis, D. L. Polla

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10 Scopus citations

Abstract

Lead scandium niobate titanate (Pb[Sc1/2Nb1/2)0.57Ti0.43]O 3) thin films with 0.5 mol% Nb doping were prepared by a sol-gel method. Films annealed at temperatures greater than 600°C crystallized into a single phase perovskite structure. The films were transparent and crack-free with uniform thickness and an average grain size of 1.1 μm. The dielectric constant and dissipation factor measured at 1 kHz for a film annealed at 700°C were 1370 and 0.022, respectively. Ferroelectricity was confirmed by the presence of hysteresis loops, with a remanent polarization of 20 μC/cm2 and coercive field of 35 kV/cm. The piezoelectric coefficient (d33) of a poled film was 98 pm/V. Dielectric, ferroelectric, and piezoelectric properties of the films were enhanced through annealing and poling after deposition of the top gold electrode.

Original languageEnglish (US)
Pages (from-to)136-140
Number of pages5
JournalMaterials Letters
Volume38
Issue number2
DOIs
StatePublished - Jan 1999

Bibliographical note

Funding Information:
This work was supported by the Office Naval Research under Contract No. N00014-95-1-0539 and the Korea Science and Engineering Foundation (KOSEF). The use of facilities in the Center for Interfacial Engineering at the University of Minnesota is gratefully acknowledged. The authors wish to thank Prof. D.A. Payne in University of Illinois at Urbana-Champaign for useful discussions on solution preparation.

Keywords

  • 68.55.Jk
  • 77.65.Bn
  • 77.84.-s
  • 81.15.Lm
  • 82.80.Pv
  • Lead scandium niobate titanate
  • Microelectromechanical systems
  • Piezoelectric coefficient
  • Sol-gel
  • Thin film

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