期刊
ACTA MATERIALIA
卷 58, 期 8, 页码 3050-3058出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2010.01.039
关键词
Ferroelectric; Curie temperature; Critical thickness; Stability analysis
资金
- Research Grants Council of the Hong Kona Special Administrative Region [G-YXOT, N_534/08. 5305/07E]
- National Science Foundation of China [10902128, 10831160504, 50802026]
The size, surface and interface effects on the magnitude and stability of spontaneous polarization in a symmetric nanoscale ferroelectric capacitor were studied by analyzing its evolutionary trajectory based on a thermodynamic model. Analytic expressions of the Curie temperature, spontaneous polarization, critical thickness and the Curie-Weiss relation were derived, taking into account the effects of the depolarization field, built-in electric field, interfaces and surfaces Our results show that the critical properties are not only functions of the ambient temperature, misfit strain and electromechanical boundary conditions, but also depend on the characteristics of electrodes, surfaces and interfaces, through the incomplete charge compensation, near-surface variation of polarization and work function steps of ferroelectric-electrode interfaces, which are adjustable (C) 2010 Acta Materialia Inc Published by Elsevier Ltd All rights reserved
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据