Calculations on switching characteristics of ferroelectric-paraelectric superlattices

被引：12
|
作者：
Ong, Lye-Hock [1 ]
Lee, Thong-Yan [1 ]
Chew, Khian-Hooi [1 ]
机构：
[1] Univ Sains Malaysia, Sch Phys, Minden 11800, Penang, Malaysia
来源：
CERAMICS INTERNATIONAL | 2012年 / 38卷
关键词：
Interfaces; Ferroelectric properties; Polarization switching; Superlattices; BATIO3/SRTIO3; SUPERLATTICES;
D O I：
10.1016/j.ceramint.2011.04.036
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We study the switching characteristics of a superlattice consisting of a periodic ferroelectric and paraelectric layer with interlayer coupling using the Landau - Khalatnikov equation. The inhomogeneity of polarization at the ferroelectric or paraelectric surface is described by the extrapolation length delta. The effects of various parameters such as the viscosity coefficient, layer thickness, interlayer coupling and temperature on the switching characteristics are investigated. Our study shows that the hysteresis loop and switching current versus applied field depend strongly on those parameters. Inter layer coupling increases the ferroelectricity of the superlattice, leading to a strong enhancement in polarization and coercive field. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码：S3 / S7
页数：5
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