摘要
铁电材料的极化机制包括:位移极化,转向极化.位移极化正比于外加电场;将电畴的固有电矩在极化方向按玻尔兹曼能量取加权平均得到转向极化.由此推出一个简单的解析表达式,表达了铁电材料极化强度P与外电场E的本构关系.将该解析表达式的结果与文献给出的电滞回线实验数据进行比较,2者符合得非常好.该解析表达式对磁滞回线的模拟效果也非常令人满意.
The polarization mechanism of ferroelectric materials includes displacement polarization and turning-direction polarization. Displacement polarization is directly proportional to loading electric field; turning-direction polarization results from the average of domain＇s inherent electric moment in the polarization direction by the weight of Boltzmann energy. Then a simple analytical formula is obtained, which expresses the constitutive relation between polarization P and loading electric field E of ferroelectric materials. The formula＇s solution is in agreement with experiment data of electric hysteresis loop. The formula also fits the data of magnetic hysteresis loop very well.
出处
《宁夏大学学报（自然科学版）》
CAS
北大核心
2007年第1期29-31,共3页
Journal of Ningxia University(Natural Science Edition)
基金
宁夏大学自然科学基金资助项目
宁夏高等学校科研基金资助项目
关键词
铁电
电滞回线
极化
本构关系
ferroelectric
the hysteresis loop
polarization
constitutive relation
