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Effect of grain size on the fatigue properties of Pb(Zr0.3Ti0.7)O3 thin films prepared by metalorganic decomposition

  • F. Yan*
  • , P. Bao
  • , H. L.W. Chan
  • , C. L. Choy
  • , X. Chen
  • , J. Zhu
  • , Y. Wang
  • *Corresponding author for this work
  • Nanjing University

Research output: Contribution to journalConference articlepeer-review

Abstract

The fatigue properties of PZT thin films with Pt electrodes are strongly influenced by the grain size. A film with smaller grains has better fatigue properties. We assume that the fatigue is mainly due to the pinning of domain walls in PZT grains by space charges or charged point defects near the Pt electrodes. The point defects always accumulate near the PZT/Pt interface because the internal electric field is very strong near the interface. Therefore the film with a lower fraction of grains touching the Pt electrodes has better fatigue properties. The permittivity of the thin film decreases with decreasing grain size. This may arise from a decrease in the mobility of the domain walls.

Original languageEnglish
Pages (from-to)209-216
Number of pages8
JournalFerroelectrics
Volume252
Issue number1-4
DOIs
StatePublished - 2001
Externally publishedYes
Event6th International Simposium on Ferroic Domains and Mesoscopic Structures (ISFD-6) - Nanjing, China
Duration: 29 May 20002 Jun 2000

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