Unusual dielectric properties of CaCu3Ti4O12

Wataru Kobayashi*, I. Terasaki

*この研究の対応する著者

    研究成果: Chapter

    抄録

    The A-site ordered perovskite CaCu3Ti4O12 has been extensively studied since the discovery of the huge dielectric constant by Subramanian and the coworkers. This material is clearly different from conventional ferroelectrics, because the dielectric constant comes from neither structure phase transitions nor soft phonons. The huge value is thus most likely to be extrinsic, and can be explained by a barrier layer capacitor model. An important feature is that the dielectric constant is well controlled in the forms of solid solutions and composites. In this article, we will review various aspects of CaCu3Ti4O12 such as the basic physical properties, the impurity effects, and the composites with other dielectrics to show how unusual they are. We further introduce some related oxides that have unconventional physical properties originated from the peculiar crystal structure of AAB4O12.

    本文言語English
    ホスト出版物のタイトルRecent Advances in Dielectric Materials
    出版社Nova Science Publishers, Inc.
    ページ231-247
    ページ数17
    ISBN(電子版)9781616682705
    ISBN(印刷版)9781606922668
    出版ステータスPublished - 2009 1月 1

    ASJC Scopus subject areas

    • 工学(全般)
    • 材料科学(全般)

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