arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1407.0735cond-mat.mtrl-scicond-mat.stat-mech
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晶体铁电体中磁滞现象的模拟:利用电场参数控制磁滞回线形状

Modeling of hysteresis phenomena in crystalline ferroelectrics: hysteresis loops shape control by means of electric field parameters

A. Yu. Zakharov, M. I. Bichurin

摘要:

本文提出用弛豫型方程描述晶体铁电体中的畴变过程,并考虑了外电场的变化。在任意电场随时间变化的情况下,得到了这些方程的封闭解析形式的精确解。用数值方法分析了正弦外场频率与磁滞回线形状的关系。计算结果与实验数据定性一致。PACS:77.80.Fm,77.80.Dj,77.80.-关键词:铁电体,开关过程,磁滞,极化

英文摘要:

Description of domains switching processes in crystalline ferroelectrics by means of relaxation type equations with account of variable external electric field is proposed. Exact solution of these equations in closed analytical form at arbitrary dependence of electric field on time is obtained. A connection between frequency of sinusoidal external field and hysteresis loops shapes is analysed by numerical way. The calculation results are in qualitative accordance with experimental data. PACS: 77.80.Fm, 77.80.Dj, 77.80.-e Keywords: ferroelectrics, switching process, hysteresis, polarization

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