Crystallographic features of the relaxor state in the mixed ferroelectric system Ba(Ti1-xZrx)O3

Hirofumi Tsukasaki, Yasuhide Inoue, Yasumasa Koyama

    研究成果: Conference contribution

    抜粋

    The relaxor state has been found in the mixed ferroelectric system Ba(Ti1-xZrx)O3 around x = 0.35. To understand the nature of the relaxor state, the crystallographic features of the paraelectric (PC), ferroelectric, and relaxor states for 0.15 ≤ x ≤ 0.40 have been investigated mainly by transmission electron microscopy. It was found that a microstructure of the ferroelectric state for 0.15 ≤ x ≤ 0.28 consisted of banded structures with boundaries parallel to the {110}PC and {100}PC planes. Based on the Sapriel theory concerning ferroelastic transitions, it was understood that the banded structures were consistent with domain structures in the ferroelectric rhombohedral (FR) state having a polarization vector parallel to one of the <111> PC directions. With the help of the failure of Friedel's law in diffraction, furthermore, polar regions having <001>PC and <110>PC components of a <111>PC polarization vector were also found to be separately observed in the PC and relaxor states as well as the FR state. Then, in-situ observation for 0.29 ≤ x ≤ 0.40 made in this study indicated that the PC and relaxor states consisted of polar nanometer-sized regions having these two components. Based on this, the relaxor state in BTZ can be identified as an assembly of polar nanometer-sized regions, which were produced by the suppression of the (PC→FR) ferroelectric transition on cooling.

    元の言語English
    ホスト出版物のタイトルMaterials Science Forum
    出版者Trans Tech Publications Ltd
    ページ2400-2405
    ページ数6
    783-786
    ISBN(印刷物)9783038350736
    出版物ステータスPublished - 2014
    イベント8th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2013 - Las Vegas, NV
    継続期間: 2013 12 22013 12 6

    出版物シリーズ

    名前Materials Science Forum
    783-786
    ISSN(印刷物)02555476

    Other

    Other8th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2013
    Las Vegas, NV
    期間13/12/213/12/6

      フィンガープリント

    ASJC Scopus subject areas

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

    これを引用

    Tsukasaki, H., Inoue, Y., & Koyama, Y. (2014). Crystallographic features of the relaxor state in the mixed ferroelectric system Ba(Ti1-xZrx)O3 Materials Science Forum (巻 783-786, pp. 2400-2405). (Materials Science Forum; 巻数 783-786). Trans Tech Publications Ltd.