Proceedings of the XIX All-Russian Conference on Physics of Ferroelectrics (VKS-XIX) (Moscow, Russia, June 19-23, 2011

Effect of anharmonicity of the crystal potential on ferroelectric–antiferroelectric phase transitions

V. M. Ishchuk, N. A. Spiridonov

Research Institute "Reactivelectron", Donetsk

Abstract: The ferroelectric-antiferroelectric phase transitions in lead zirconate-titanate-based solid solutions have been considered with allowance made for anharmonicity of the crystal potential. In the phase diagram of lead zirconate-titanate, the boundary separating the regions of the ferroelectric and antiferroelectric states are shifted toward higher titanium concentrations. The calculated and experimental phase diagrams are presented for such cases.

 English version: Physics of the Solid State, 2012, 54:5, 927–929

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