Structural heterogeneity and diffuse scattering in morphotropic lead zirconate-titanate single crystals

Abstract

Complementary diffuse and inelastic synchrotron X-ray scattering measurements of lead zirconate-titanate single crystals with composition near the morphotropic phase boundary (x=0.475) are reported. In the temperature range 293 K < T < 400 K a highly anisotropic quasielastic diffuse scattering is observed. Above 400 K this scattering disappears. Its main features can be reproduced by model of inhomogeneous lattice deformations caused by inclusions of a tetragonal phase into a rhombohedral or monoclinic phase. This observation supports the idea that PZT at its morphotropic phase boundary is essentially structurally inhomogeneous.

4 pages, 4 figures

References in corpus (6)

• A Neutron Elastic Diffuse Scattering Study of PMN
• A reassessment of the Burns temperature and its relationship to the diffuse scattering, lattice dynamics, and thermal expansion in the relaxor PMN
• Optically Isotropic and Monoclinic Ferroelectric Phases in PZT Single Crystals near Morphotropic Phase Boundary
• Single Crystal Study of Competing Rhombohedral and Monoclinic Order in Lead Zirconate Titanate
• Phase transitions and ferroelectrics: revival and the future in the field
• Octahedral tilting, monoclinic phase and the phase diagram of PZT

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• Confirmation of the monoclinic Cc space group for the ground state phase of Pb(Zr0.525Ti0.475)O3 (PZT525): A Combined Synchrotron X-Ray and Neutron Powder Diffraction Study
• Antiferrodistortive Phase Transition in Pseudorhombohedral (Pb0.94Sr0.06)(Zr0.550Ti0.450)O3 : A Combined Synchrotron x-ray and Neutron Powder Diffraction Study