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 publicationMaterials Science Forum
    Pages1737-1742
    Number of pages6
    Volume638-642
    DOIs
    Publication statusPublished - 2010
    Event6th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2009 - Berlin
    Duration: 2009 Aug 252009 Aug 29

    Publication series

    NameMaterials Science Forum
    Volume638-642
    ISSN (Print)02555476

    Other

    Other6th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2009
    CityBerlin
    Period09/8/2509/8/29

    Fingerprint

    Phase boundaries
    Ferroelectric materials
    dielectric properties
    Dielectric properties
    transmission electron microscopy
    crystal structure
    oxygen
    Crystal structure
    Oxygen
    Transmission electron microscopy

    Keywords

    • Domain structure
    • PbLa(ZrTi)O
    • Relaxor ferroelectrics
    • Tetragonal/rhombohedral phase boundary
    • Transmission electron microscopy

    ASJC Scopus subject areas

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

    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 Materials Science Forum (Vol. 638-642, pp. 1737-1742). (Materials Science Forum; Vol. 638-642). https://doi.org/10.4028/www.scientific.net/MSF.638-642.1737

    Crystallographic features of ferroelectric states around the tetragonal/rhombohedral phase boundary in Pb1-xLax(Zr 1-yTiy)O3 . / Arao, Masazumi; Inoue, Yasuhide; Ando, Ryoutarou; Koyama, Yasumasa.

    Materials Science Forum. Vol. 638-642 2010. p. 1737-1742 (Materials Science Forum; Vol. 638-642).

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

    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 Materials Science Forum. vol. 638-642, Materials Science Forum, vol. 638-642, pp. 1737-1742, 6th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2009, Berlin, 09/8/25. https://doi.org/10.4028/www.scientific.net/MSF.638-642.1737
    Arao, Masazumi ; Inoue, Yasuhide ; Ando, Ryoutarou ; Koyama, Yasumasa. / Crystallographic features of ferroelectric states around the tetragonal/rhombohedral phase boundary in Pb1-xLax(Zr 1-yTiy)O3 Materials Science Forum. Vol. 638-642 2010. pp. 1737-1742 (Materials Science Forum).
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    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.",
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