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

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

2007-01-30

arxiv.org/abs/cond-mat/0701754v1

Phys. Rev. Lett. 98, 255701 (2007)

Physics

Condensed Matter

Materials Science

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.98.255701

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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