Core-shell structure and size effect in barium titanate nanoparticle

被引：50
|
作者：
Fang, Chao [1 ,2 ]
Zhou, DongXiang [2 ]
Gong, ShuPing [2 ]
机构：
[1] Wuhan Polytech Univ, Dept Math & Phys, Wuhan 430023, Peoples R China
[2] Huazhong Univ Sci & Technol, Dept Elect Sci & Technol, Wuhan 430074, Hubei Province, Peoples R China
来源：
PHYSICA B-CONDENSED MATTER | 2011年 / 406卷 / 6-7期
关键词：
Nanoparticle; Core-shell; Ferroelectric; Dielectric; DIELECTRIC-PROPERTIES; FERROELECTRIC CERAMICS; BATIO3; PARTICLES; THIN-FILMS; DEPENDENCE; POWDER;
D O I：
10.1016/j.physb.2011.01.024
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
A quantitative core-shell structure model on the grain size effect of nano-BaTiO3 ceramics has been proposed on the basis of the Ginsburg-Landau-Devonshire thermodynamic theory. In this study, we have considered the existence of surface effects, which leads to the core-shell structure in BaTiO3 nanoparticles consisting of inner tetragonal core, gradient lattice strain layer, and surface cubic layer. The size effects on the spontaneous polarization, Curie temperature, c/a ratio, and electrocaloric and dielectric properties of BaTiO3 ferroelectric nanoparticle are successfully explained. Theoretical and experimental results for BaTiO3 nanoparticle are compared and discussed. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：1317 / 1322
页数：6
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