Presence of the ferroelectric monoclinic state in the mixed ferroelectric system Ba(Ti 1-xZr x)O 3

Hirofumi Tsukasaki, Yasumasa Koyama

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

4 Citations (Scopus)

Abstract

The mixed-oxide system Ba(Ti 1-xZr x)O 3 (BTZ) with the simple perovskite structure was reported to exhibit the remarkable dielectric response around x = 0.08. In order to understand the origin of the response, we have investigated the crystallographic features of ferroelectric states in BTZ with 0 ≤ x ≤ 0.15 mainly by transmission electron microscopy. According to the constructed phase diagram of BTZ, when the Zr content increases from x = 0 around 300 K, the ferroelectric tetragonal state in BaTiO3 is changed into the ferroelectric orthorhombic state around x = 0.03, and then into the ferroelectric monoclinic state around x = 0.06. That is, the monoclinic state with a polarization vector in the {110}PC planes is present in BTZ with 0.07 ≤ x ≤ 0.15, where the subscript PC denotes the paraelectric cubic state. The notable feature of the monoclinic state is that it exhibits the herringbone-type domain structure consisting of nanometer-sized ferroelectric domains. It is thus understood that the remarkable dielectric response in BTZ should be associated with the presence of nanometer-sized domains with the monoclinic symmetry.

Original languageEnglish
Title of host publicationTHERMEC 2011 Supplement
Pages555-560
Number of pages6
DOIs
Publication statusPublished - 2012 Jan 4
Event7th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC'2011 - Quebec City, QC, Canada
Duration: 2011 Aug 12011 Aug 5

Publication series

NameAdvanced Materials Research
Volume409
ISSN (Print)1022-6680

Conference

Conference7th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC'2011
CountryCanada
CityQuebec City, QC
Period11/8/111/8/5

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Keywords

  • Ba(Ti Zr )O
  • Dielectric response
  • Ferroelectric domain structure
  • Morphotropic phase boundary
  • Transmission electron microscopy

ASJC Scopus subject areas

  • Engineering(all)

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