Structurally frustrated relaxor ferroelectric behavior in CaCu 3 Ti 4 O 12
Structurally frustrated relaxor ferroelectric behavior in CaCu 3 Ti 4 O 12
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DOI：
10.1103/physrevb.72.134104
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发表时间：
2005-10
影响因子：
3.7
通讯作者：
Yun Liu;R. Withers;Xiaoyong Wei
中科院分区：
文献类型：
--
作者：
Yun Liu;R. Withers;Xiaoyong Wei
直接衍射证据的结构受挫弛豫铁电行为的形式在一维相关的，偏心位移的Ti离子的TiO{sub 6}八面体的CaCu{sub 3}Ti{sub 4}O{sub 12}（CTO）已获得。当再加上观察的铁电效应，重要的影响，理解的非凡的介电性能的CCTO出现。在没有外加电场的情况下，初期的铁电行为仅与TiO{sub 6}八面体的沿着一维列相关，这提供了对CCTO的基本性质的关键洞察，并表明存在一类独特的结构受抑的铁电弛豫体。
Direct diffraction evidence for structurally frustrated relaxor ferroelectric behavior in the form of one-dimensionally correlated, off-center displacements of Ti ions within the TiO{sub 6} octahedra of CaCu{sub 3}Ti{sub 4}O{sub 12} (CCTO) has been obtained. When coupled with the observation of a ferroelectric effect, important implications for the understanding of the extraordinary dielectric properties of CCTO arise. That the incipient ferroelectric behavior is correlated only along one-dimensional columns of TiO{sub 6} octahedra in the absence of an applied electric field offers a crucial insight into the underlying nature of CCTO and suggests the existence of a unique class of structurally frustrated, ferroelectric relaxors.