Optically Isotropic and Monoclinic Ferroelectric Phases in PZT Single Crystals near Morphotropic Phase Boundary

Alexei A. Bokov; Xifa Long; Zuo-Guang Ye

doi:10.1103/PhysRevB.81.172103

Optically Isotropic and Monoclinic Ferroelectric Phases in PZT Single Crystals near Morphotropic Phase Boundary

Materials Science 2011-08-23 v1

Authors: Alexei A. Bokov , Xifa Long , Zuo-Guang Ye

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Abstract

We report the finding of unusual scale-dependent symmetry below the ferroelectric Curie temperature in the perovskite Pb(Zr1-xTix)O3 single crystals of morphotropic phase boundary compositions. The crystals of tetragonal symmetry (from x-ray diffraction experiments) on sub-micrometer 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 Cm symmetry.

Keywords

lead zirconate titanate (PZT) morphotropic phase boundary ferroelectric domains optical isotropy monoclinic phase scale-dependent symmetry single crystals

Cite

@article{arxiv.1002.0041,
  title  = {Optically Isotropic and Monoclinic Ferroelectric Phases in PZT Single Crystals near Morphotropic Phase Boundary},
  author = {Alexei A. Bokov and Xifa Long and Zuo-Guang Ye},
  journal= {arXiv preprint arXiv:1002.0041},
  year   = {2011}
}

Comments

7 pages, 3 figures

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