Optically isotropic and monoclinic ferroelectric phases inPb(Zr1−xTix)O3(PZT) single crystals near morphotropic phase boundary

2010/01/30 by Alexei A. Bokov, Xifa Long, Zuo-Guang Ye +1
Chemistry · Materials Science · Mathematics · Physics and Astronomy · #Chemistry #Condensed matter physics #Crystal structure #Crystallographic point group #Crystallography #Dielectric #Ferroelectric and Piezoelectric Materials #Ferroelectricity #Geometry #Isotropy #Materials science #Mathematics #Monoclinic crystal system #Multiferroics and related materials #Optics #Optoelectronics #Phase (matter) #Phase boundary #Photorefractive and Nonlinear Optics #Physics #Quantum mechanics #Symmetry (geometry) #Tetragonal crystal system #cond-mat.mtrl-sci

paper · pdf · doi:10.1103/physrevb.81.172103

published as Phys. Rev. B, 81, 172103 (2010) · 7 pages, 3 figures

arxiv created 2010/01/30 · openalex publication_date 2010/05/24 · arxiv updated 2011/08/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We report the finding of unusual scale-dependent symmetry below the ferroelectric Curie temperature in the perovskite Pb(Zr_1\ensuremath-xTi_x)O₃ single crystals of morphotropic phase boundary compositions. The crystals of tetragonal symmetry on submicrometer scale exhibit a macroscopic (optically determined) cubic symmetry. This peculiar optical isotropy is explained by the anomalously small size of tetragonal ferroelectric domains. Upon further cooling the crystals transform to the phase consisting of micrometer-sized domains of monoclinic symmetry.

Citations

• Domain structure in the monoclinic Pm phase of Pb(Mg1/3Nb2/3)O3–PbTiO3 single crystals
• Phase Diagram ofPb(Zr,Ti)O3Solid Solutions from First Principles
• Structural phase transition and dielectric relaxation in Pb(Zn1/3Nb2/3)O3single crystals
• Recent progress in relaxor ferroelectrics with perovskite structure
• Phase diagram of the relaxor ferroelectric(1−x)Pb(Zn1/3Nb2/3)O3−xPbTiO3