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.
@article{arxiv.cond-mat/0701754,
title = {Low-temperature phase transformations of PZT in the morphotropic phase-boundary region},
author = {F. Cordero and F. Craciun and C. Galassi},
journal= {arXiv preprint arXiv:cond-mat/0701754},
year = {2010}
}