Common characteristics of displacive and relaxor ferroelectrics

被引：51
作者：
Bishop, A. R. [1 ]
Bussmann-Holder, A. [2 ]
Kamba, S. [3 ]
Maglione, M. [4 ]
机构：
[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
[2] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany
[3] Acad Sci Czech Republic, Inst Phys, Prague 18221 8, Czech Republic
[4] CNRS, Inst Chim Mat Condensee Bordeaux, F-33608 Pessac, France
来源：
PHYSICAL REVIEW B | 2010年 / 81卷 / 06期
关键词：
GLASSY POLARIZATION BEHAVIOR; POLARIZABILITY MODEL; OPTICAL PHONONS; SCATTERING; PBMG1/3NB2/3O3; PEROVSKITES; LIXK1-XTAO3; TRANSITION; CERAMICS; SYSTEMS;
D O I：
10.1103/PhysRevB.81.064106
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The long-standing classification scheme of ferroelectrics into either relaxor or displacive ones (the phase transition is driven by a soft phonon mode) is too restrictive since a smooth crossover between them exists which even admits for a coexistence of both phenomena. This crossover and coexistence is a consequence of the varying density of polar nanoregions due to different doping levels of the respective system. The formation of polar nanoregions is attributed here to intrinsic local modes in terms of discrete breathers.
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页数：9
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