Crystallographic features of ferroelectric states around the tetragonal/rhombohedral phase boundary in Pb1-xLax(Zr 1-yTiy)O3

Masazumi Arao, Yasuhide Inoue, Ryoutarou Ando, Yasumasa Koyama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

To understand dielectric properties around the ferroelectric tetragonal (FT)/rhombohedral (FR) phase boundary in Pb 1-xLax(Zr1-yTiy)O3, the crystallographic features of ferroelectric states around the boundary have been investigated by transmission electron microscopy. It was found that, when the Ti content approached to the phase boundary in the FT-phase area, a dielectric property became the relaxor behavior. The corresponding change in the crystallographic features is that the usual FT state is converted into the nanometer-sized coexisting state of the ferroelectric monoclinic (FM) and FR phases. Because the crystal structure of FR-phase regions in the coexisting state involves the R 25-type rotational displacement of oxygen octahedra, the F R phase can be identified as the low-temperature ferroelectric rhombohedral phase that is present in Pb(Zr1-yTiy)O 3. It is thus understood that the relaxor behavior found in Pb 1-xLax(Zr1-yTiy)O3 should be associated with the presence of the nanometer-sized coexisting state that consists of two ferroelectric phases.

Original languageEnglish
Title of host publicationTHERMEC 2009
EditorsTara Chandra, Tara Chandra, Tara Chandra, N. Wanderka, N. Wanderka, N. Wanderka, Walter Reimers, Walter Reimers, Walter Reimers, M. Ionescu, M. Ionescu, M. Ionescu
PublisherTrans Tech Publications Ltd
Pages1737-1742
Number of pages6
ISBN (Print)0878492941, 9780878492947
DOIs
Publication statusPublished - 2010 Jan 1
Event6th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2009 - Berlin, Germany
Duration: 2009 Aug 252009 Aug 29

Publication series

NameMaterials Science Forum
Volume638-642
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Conference

Conference6th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2009
CountryGermany
CityBerlin
Period09/8/2509/8/29

Keywords

  • Domain structure
  • Relaxor ferroelectrics
  • Tetragonal/rhombohedral phase boundary
  • Transmission electron microscopy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Arao, M., Inoue, Y., Ando, R., & Koyama, Y. (2010). Crystallographic features of ferroelectric states around the tetragonal/rhombohedral phase boundary in Pb1-xLax(Zr 1-yTiy)O3. In T. Chandra, T. Chandra, T. Chandra, N. Wanderka, N. Wanderka, N. Wanderka, W. Reimers, W. Reimers, W. Reimers, M. Ionescu, M. Ionescu, & M. Ionescu (Eds.), THERMEC 2009 (pp. 1737-1742). (Materials Science Forum; Vol. 638-642). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/MSF.638-642.1737