Enhancement of polarization property of PZT film by ion-substitution using rare-earth elements

Hiroshi Nakakt, Hiroshi Uchida*, Ken Nishida, Minoru Osada, Hiroshi Funakubo, Takashi Katoda, Seiichiro Koda

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Rare-earth-substituted lead zirconate titanate thin films were synthesized to improve the ferroelectric properties of lead zirconate titanate through the enhancement of its crystal anisotropy. Thin films of Pb1.00-(3x/2)o- REx(Zr0.40Ti0.60)O3 [RE-PZT(A)] and Pb1.00REx(Zr0.40Ti0.60) 1-(3x/4)O3 [RE-PZT(B)] with RE = La or Dy were deposited on (111)Pt/Ti/SiO2/(100)Si substrates by chemical solution deposition (CSD). Rare-earth-substitution did not affect the crystal orientation of the PZT-based films where the PZT(111) plane was oriented along the surface-normal direction. Dy3+ substitution based on DyPZT(B) up to x = 0.02 enhanced the crystal anisotropy (c/a) and remanent polarization (Pr) of PZT films simultaneously, while both c/a and Pr values of Dy-PZT(A) decreased as x increased continuously. On the other hand, La 3+ substitution degraded the ferroelectric properties gradually in both the case of La-PZT(A) and (B). The Dy3+ ion could be substituted for a B-site in a PZT crystal preferentially, and that promoted the crystal anisotropy and the ferroelectric properties of PZT films.

Original languageEnglish
Pages (from-to)6905-6909
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number9 B
Publication statusPublished - 2005 Sept 22
Externally publishedYes


  • Chemical solution deposition
  • Dysprosium
  • Ferroelectrics
  • Ion substitution
  • Lanthanum
  • Lead zirconate titanate
  • P-E hysteresis loop
  • Raman spectrum
  • Rare earths

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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