Suppression of the tetragonal distortion in thin Pb(Zr, Ti)O3 films grown on MgO(001)

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Abstract

The paraelectric cubic to ferroelectric tetragonal phase transformation of thin Pb(Zr, Ti)O3/MgO(001) films was studied in synchrotron x-ray scattering experiments. As the thickness of the film decreases, the transition temperature and the amount of the tetragonal distortion were decreased continuously. The thinnest 250 A thick film was purely composed of the c-type domains in the ferroelectric tetragonal phase. Based on this, we propose a model for the domain structure of the tetragonal PZT/MgO(001) film that is different from the ones suggested in literature. We attribute the suppression of the transition to the substrate effect that prefers the c-type domains near the interface, and reduces the tetragonal distortion to minimize the film-substrate lattice mismatch.

Original languageEnglish
Pages (from-to)317-322
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume493
StatePublished - 1998
Externally publishedYes
EventProceedings of the 1997 MRS Fall Symposium - Boston, MA, USA
Duration: 30 Nov 19974 Dec 1997

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