Cockayne, E.
and Rabe, K.
(2000),
Pressure Dependence of Instabilities in Perovskite PbZrO<sub>3</sub>, Journal of Physics and Chemistry of Solids
(Accessed December 14, 2024)
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Pressure Dependence of Instabilities in Perovskite PbZrO3
Published
Author(s)
, K M. Rabe
Abstract
We have computed the frequencies of selected normal modes in perovskite PbZrO3 (PZ) as a function of lattice parameter using local density functional theory variational linear response. The most significant instabilities that freeze in to give the orthorhombic antiferroelectric phase in PZ and the low-temperature rhombohedral ferroelectric phase in PbZr1-xTixO3 (PZT) all become more unstable under pressure. The most unstable antiferroelectric ς3 mode destabilizes more rapidly than the unstable zone center polar mode. This provides and explanation for the observed ferroelectric-antiferroelectric transition in (modified) Zr-rich PZT under applied pressure.Citation
Journal of Physics and Chemistry of Solids
Volume
61
Pub Type
Journals
Keywords
DFT, first-principles calculations, LDA, lead zirconate, lead zirconate titanate, phonons, PZT
Citation
Issues
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Created January 21, 2000, Updated February 19, 2017