Structurally frustrated relaxor ferroelectric behavior in CaCu 3 Ti 4 O 12
Date
2005
Authors
Liu, Yun
Withers, Raymond
Wei, Xiao
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Volume Title
Publisher
American Physical Society
Abstract
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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Source
Physical Review B: Condensed Matter and Materials
Type
Journal article