Precursor dynamics, incipient ferroelectricity and huge anharmonicity in antiferroelectric lead zirconate PbZrO3

被引：43

作者：

Bussmann-Holder, Annette ^{[1
]}

Ko, Jae-Hyeon ^{[2
]}

Majchrowski, Andrzej ^{[3
]}

Gorny, Michal ^{[4
]}

Roleder, Krystian ^{[4
]}

机构：

[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[2] Hallym Univ, Dept Phys, Chunchon 200702, Gangwondo, South Korea

[3] Mil Univ Technol, Inst Appl Phys, PL-00908 Warsaw, Poland

[4] Silesian Univ, Inst Phys, PL-40007 Katowice, Poland

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2013年 / 25卷 / 21期

基金：

新加坡国家研究基金会;

关键词：

PHASE-TRANSITIONS; POLARIZATION; SCATTERING; ROTATIONS;

D O I：

10.1088/0953-8984/25/21/212202

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

To better understand the phase transition mechanism of PbZrO3 (PZO), the lattice dynamics of this antiferroelectric compound are investigated within the polarizability model, with emphasis on the cubic to orthorhombic phase transition. Similarly to ferroelectric phase transitions in ABO(3) perovskites, polar dynamical clusters develop and grow in size upon approaching T-C from the high temperature side and never form a homogeneous state. Simultaneously, elastic anomalies set in and compete with polar cluster dynamics. These unusual dynamics are responsible for precursor effects that drive the PZO lattice towards an incipient ferroelectric state. Comparison of the model calculations with the temperature dependences of elastic coefficients measured on PZO single crystals reveals a striking similarity.

引用

页数：5

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