Unusual impurity effects on the dielectric properties of CaCu 3-xMnxTi4O12

Wataru Kobayashi*, I. Terasaki

*この研究の対応する著者

    研究成果: Article査読

    40 被引用数 (Scopus)

    抄録

    CaCu3Ti4O12 has a large dielectric constant (ε∼104 at 300 K), which is almost constant above 100 K, followed by a 100-fold reduction below 100 K. The physical mechanism of this anomalous behavior has been extensively investigated. We found that only 2% substitution of Mn for Cu dramatically quenches the huge ε of 10 4 down to 100 over the measured temperature range from 4.2 to 300 K. In usual substitution effects, 2% impurity induces a tiny change in ε of the order of 2%. Thus the present substitution effect suggests that dipole moments cause fluctuating ferroelectric domains in CaCu3Ti 4O12, as is similar to the frustrated dipole glass in LuFe2O4.

    本文言語English
    ページ(範囲)771-772
    ページ数2
    ジャーナルPhysica B: Condensed Matter
    329-333
    II
    DOI
    出版ステータスPublished - 2003 5

    ASJC Scopus subject areas

    • 材料科学(全般)
    • 凝縮系物理学

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