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Low-temperature phase transformations of PZT in the morphotropic phase-boundary region

F. Cordero·F. Craciun·C. Galassi
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Abstract

We present anelastic and dielectric spectroscopy measurements of PbZr(1-x)Ti(x)O(3) with 0.455 < x < 0.53, which provide new information on the low temperature phase transitions. The tetragonal-to-monoclinic transformation is first-order for x < 0.48 and causes a softening of the polycrystal Young's modulus whose amplitude may exceed the one at the cubic-to-tetragonal transformation; this is explainable in terms of linear coupling between shear strain components and tilting angle of polarization in the monoclinic phase. The transition involving rotations of the octahedra below 200 K is visible both in the dielectric and anelastic losses, and it extends within the tetragonal phase, as predicted by recent first-principle calculations.

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F. Cordero, F. Craciun, C. Galassi. 2007-01-30. Low-temperature phase transformations of PZT in the morphotropic phase-boundary region. https://doi.org/10.1103/physrevlett.98.255701

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