Structurally frustrated relaxor ferroelectric behavior in CaCu3Ti4O12 -: art. no. 134104

被引：107

作者：

Liu, Y ^{[1
]}

Withers, RL

Wei, XY

机构：

[1] Australian Natl Univ, Res Sch Chem, Canberra, ACT 0200, Australia

[2] Xi An Jiao Tong Univ, EMRL, Xian 710049, Shaanxi, Peoples R China

来源：

PHYSICAL REVIEW B | 2005年 / 72卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.72.134104

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Direct diffraction evidence for structurally frustrated relaxor ferroelectric behavior in the form of one-dimensionally correlated, off-center displacements of Ti ions within the TiO6 octahedra of CaCu3Ti4O12 (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 < 001 > columns of TiO6 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.

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