基于极化反转函数的铁电电容器件模型

doi:10.3969/j.issn.0372-2112.2012.08.014

电子学报

基于极化反转函数的铁电电容器件模型

闻心怡, 周文利, 王耘波, 高俊雄, 于军

华中科技大学电子科学与技术系, 湖北武汉 430074

收稿日期:2010-11-13 修回日期:2012-04-24 出版日期:2012-08-25
- 作者简介:
- 闻心怡 男,1981年出生于湖北省武汉市,现为华中科技大学电子科学与技术系博士研究生,主要研究方向:铁电薄膜与集成铁电器件. E-mail:shiiuen@gmail.com 周文利 女,1968年出生,现为华中科技大学电子科学与技术系教授,主要研究方向:新型存储器件、半导体芯片设计与工艺. 于军 男,1946年出生,现为华中科技大学电子科学与技术系教师、博士生导师,主要研究方向:铁电学与集成铁电器件、半导体芯片设计与工艺. E-mail:jyu2886@163.com
- 基金资助:
- 国家自然科学基金重大研究计划 (No.90407023); 国家自然科学基金面上项目 (No.60971008)

Device Model of Ferroelectric Capacitor Based on Polarization Reversal Function

WEN Xin-yi, ZHOU Wen-li, WANG Yun-bo, GAO Jun-xiong, YU Jun

Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China

Received:2010-11-13 Revised:2012-04-24 Online:2012-08-25 Published:2012-08-25
- Supported by:
- Major Research Project of National Natural Science Foundation of China (No.90407023); National Natural Science Foundation of China (No.60971008)

摘要/Abstract

摘要： 通过分析铁电薄膜微观结构及铁电畴在外电场作用下极化反转机理,将铁电畴等效为一群具有相互独立矫顽场的铁电偶极子.采用几何方法,解释了这些偶极子在不规则电压波形驱动下极化反转的规律.在此基础上,引入铁电电容的极化反转函数来表征铁电电容宏观极化强度随外电场变化的数学表达式.该函数的引入不仅简化了模型的计算量,还成功避免了同类模型中数值微分和数值积分所带来的误差,大大提高了模型精确性.

关键词: 铁电薄膜电容, 建模, 偶极子, 电滞回线

Abstract: Based on the microstructure and the domain reversal behavior of ferroelectric thin films,the ferroelectric domains are abstracted as a cluster of dipoles.Each dipole has self-independent coercive field,and the complicated mechanism of their polarization switching under random signal is considerably facilitated by a geometric interpretation.Then,we introduce the concept of polarization switching function to represent the relation between the macroscopical polarization and electric field.The polarization switching function also help to simply the computation and avoid the enhanced errors from the differentiations of experimental data.A model based on polarization reversal function is developed,which has explicit physical background and concise mathematical formalism.

Key words: ferroelectric film capacitors, model, dipole, hysteresis

中图分类号:

TN384
TN402

闻心怡, 周文利, 王耘波, 等. 基于极化反转函数的铁电电容器件模型[J]. 电子学报, DOI: 10.3969/j.issn.0372-2112.2012.08.014.

WEN Xin-yi, ZHOU Wen-li, WANG Yun-bo, et al. Device Model of Ferroelectric Capacitor Based on Polarization Reversal Function[J]. Acta Electronica Sinica, DOI: 10.3969/j.issn.0372-2112.2012.08.014.

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基于极化反转函数的铁电电容器件模型

Device Model of Ferroelectric Capacitor Based on Polarization Reversal Function

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