ThI3: Thermodynamic phenomenology of selected compositions in the lanthanum-modified lead zirconate-titanate solid solution system

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Abstract
The application of the Landau-Devonshire thermodynamic formalism to selected compositions in the La-modified PZT system is described. For both pure lead titanate and PZT 65/35, experimental data least likely to be influenced by the elastic boundary conditions in polycrystalline specimens are used to investigate the renormalization of the phase transition temperature and higher-order dielectric stiffness coefficients as a function of the extent of lanthanum doping. Implications with regard to the intrinsic elastodielectric properties and phase transition behavior are briefly discussed.