Unusual dielectric properties of CaCu3Ti4O12

Wataru Kobayashi, I. Terasaki

    Research output: Chapter in Book/Report/Conference proceedingChapter

    Abstract

    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.

    Original languageEnglish
    Title of host publicationRecent Advances in Dielectric Materials
    PublisherNova Science Publishers, Inc.
    Pages231-247
    Number of pages17
    ISBN (Electronic)9781616682705
    ISBN (Print)9781606922668
    Publication statusPublished - 2009 Jan 1

    Fingerprint

    Dielectric properties
    Permittivity
    Physical properties
    Composite materials
    Phonons
    Perovskite
    Oxides
    Ferroelectric materials
    Solid solutions
    Capacitors
    Crystal structure
    Phase transitions
    Impurities
    perovskite

    ASJC Scopus subject areas

    • Engineering(all)
    • Materials Science(all)

    Cite this

    Kobayashi, W., & Terasaki, I. (2009). Unusual dielectric properties of CaCu3Ti4O12 In Recent Advances in Dielectric Materials (pp. 231-247). Nova Science Publishers, Inc..

    Unusual dielectric properties of CaCu3Ti4O12 . / Kobayashi, Wataru; Terasaki, I.

    Recent Advances in Dielectric Materials. Nova Science Publishers, Inc., 2009. p. 231-247.

    Research output: Chapter in Book/Report/Conference proceedingChapter

    Kobayashi, W & Terasaki, I 2009, Unusual dielectric properties of CaCu3Ti4O12 in Recent Advances in Dielectric Materials. Nova Science Publishers, Inc., pp. 231-247.
    Kobayashi W, Terasaki I. Unusual dielectric properties of CaCu3Ti4O12 In Recent Advances in Dielectric Materials. Nova Science Publishers, Inc. 2009. p. 231-247
    Kobayashi, Wataru ; Terasaki, I. / Unusual dielectric properties of CaCu3Ti4O12 Recent Advances in Dielectric Materials. Nova Science Publishers, Inc., 2009. pp. 231-247
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