Structural and optical properties of Bi3.25Nd 0.75Ti3O12 ferroelectric thin films

  • J. H. Ma*
  • , X. J. Meng
  • , J. L. Sun
  • , J. Q. Xue
  • , Z. G. Hu
  • , F. W. Shi
  • , T. Lin
  • , J. H. Chu
  • *Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Ferroelectric Bi3.25Nd0.75Ti3O 12 (BNT) thin films were grown on (111)Pt/Ti/SiO2/Si substrates by a chemical solution method. The films were composed of large rod-like grains. XRD and Raman spectroscopy measurements showed they were polycrystalline perovskite structure with a good crystallinity. Pt/BNT/Pt capacitors had been fabricated and showed good ferroelectricity. The optical constants (n, k) of BNT thin films in the wavelength ranges of 0.2-1.7 μm and 2.5-11.4 μm were obtained by spectroscopic ellipsometry measurements. The dispersion of the refractive index in the interband transition region followed the single electronic oscillator model. The optical band gap was found to be about 3.61 eV.

Original languageEnglish
Pages (from-to)439-442
Number of pages4
JournalApplied Physics A: Materials Science and Processing
Volume88
Issue number2
DOIs
StatePublished - Aug 2007
Externally publishedYes

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