Precursor dynamics to the structural instability in SrTiO3

被引：19
作者：
Roleder, K. [1 ]
Bussmann-Holder, A. [2 ]
Gorny, M. [1 ]
Szot, K. [3 ]
Glazer, A. M. [4 ]
机构：
[1] Univ Silesia, Inst Phys, PL-40007 Katowice, Poland
[2] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany
[3] Forschungszentrum Julich, D-52425 Julich, Germany
[4] Univ Oxford, Clarendon Lab, Oxford OX1 3PU, England
来源：
PHASE TRANSITIONS | 2012年 / 85卷 / 11期
关键词：
perovskite; structural instability; precursor dynamics; birefringence; K PHASE-TRANSITION; STRONTIUM-TITANATE; FERROELECTRICITY; SCATTERING; BIREFRINGENCE; BEHAVIOR; MODES;
D O I：
10.1080/01411594.2012.699051
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
The structural instability of SrTiO3 at T-S = 105 K is reinvestigated experimentally and theoretically by birefringence measurements and within the self-consistent phonon approximation. Analogous to BaTiO3 the phase transition shows precursor dynamics starting approximately 60 K above the phase transition temperature. These rotational dynamic clusters compete with precursor effects stemming from the polar soft mode and appear on different length scales as compared to BaTiO3.
引用
收藏
页码：939 / 948
页数：10
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