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Journal of Materials Science

, Volume 44, Issue 19, pp 5375–5382 | Cite as

Heterolayered PZT thin films of different thicknesses and stacking sequence

  • F. C. Kartawidjaja
  • C. H. Sim
  • J. WangEmail author
Ferroelectrics
First Online:

Abstract

The effects of stacking sequence and thickness toward the texture and electrical properties of heterolayered PbZrxTi1−xO3 (PZT) films, consisting of alternating PbZr0.7Ti0.3O3 and PbZr0.3Ti0.7O3 layers, have been studied. Thickness dependence is observed in the ferroelectric and dielectric behavior of the heterolayered PZT films whereby the remanent polarization (Pr) and relative permittivity (ε) increase with thickness, while coercive field (Ec) decreases. When baked at 500 °C and thermally annealed at 650 °C, the heterolayered PZT films regardless of their stacking sequence exhibit perovskite phase with (001)/(100) preferred orientation. Interestingly, the stacking sequence of the heterolayered PZT films dictates the morphology of the films which eventually affects the ferroelectric and dielectric performance. The heterolayered PZT film with PbZr0.7Ti0.3O3 as the first layer (heterolayered PZ70T30 film) exhibits a large grain size in the range of 1–3 μm and shows superior properties as compared to the heterolayered PZT films with PbZr0.3Ti0.7O3 as the first layer (heterolayered PZ30T70 film), which exhibits a much smaller grain size. From the sub-switching field measurement according to the Rayleigh law, there appears a lower concentration or mobility of domain walls in the small-grained heterolayered PZ30T70 films.

Keywords

Domain Wall Interfacial Layer Relative Permittivity Thickness Dependence Ferroelectric Film 
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Notes

Acknowledgements

This paper is based on work supported by the Science and Engineering Research Council—A*Star, Singapore under Grant No. 012 101 0130. The authors would like to thank Dr. Debbie Seng Hwee Leng for her time and efforts on SIMS measurements and Dr. X.J. Lou for his time in discussion. The authors would like to acknowledge the support of National University of Singapore in this project.

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  1. 1.Department of Materials Science & Engineering, Faculty of EngineeringNational University of SingaporeSingaporeSingapore

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