| 薄膜厚度对铁电薄膜铁电性能的影响 |
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| 引用本文： | 李琳,周振功.薄膜厚度对铁电薄膜铁电性能的影响[J].哈尔滨工程大学学报,2009,30(9). |
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| 作者姓名： | 李琳 周振功 |
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| 作者单位： | 1. 哈尔滨工程大学,工程训练中心,黑龙江,哈尔滨,150001
2. 哈尔滨工业大学,复合材料研究所,黑龙江,哈尔滨,150001 |
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| 基金项目： | 国家自然科学基金资助项目，哈尔滨工程大学基础研究基金资助项目 |
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| 摘 要： | 为研究薄膜厚度对外延铁电薄膜铁电性能的影响,应用与时间有关的Ginzburg-Landau方程,在同时考虑应力和表面效应的条件下,获得了不同应力情况下,不同厚度铁电薄膜的电滞回线及蝶形应变迟滞回线.计算结果显示,处于不同应力值下的铁电薄膜,剩余极化强度和场致应变随着薄膜厚度的增加而增加.而矫顽场随着薄膜厚度的增加而减小.证明了不同应力情况下,薄膜厚度对剩余极化强度和矫顽场的影响是不能忽略的.这种变化趋势与实验结果的情况是一致的.
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| 关 键 词： | 铁电薄膜 薄膜厚度 应力 电滞回线 |
Effects of film thickness on the properties of ferroelectric film |
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| LI Lin,ZHOU Zhen-gong.Effects of film thickness on the properties of ferroelectric film[J].Journal of Harbin Engineering University,2009,30(9). |
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| Authors: | LI Lin ZHOU Zhen-gong |
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| Abstract: | By taking both stress and surface effects into account, the effect of thickness on ferroelectric films was investigated by using the time-dependent Ginzburg-Landau equation. Polarization hysteresis and butterfly hysteresis of various film thicknesses under different stresses were numerically simulated. The results show that under different stresses, the coercive field decreases with film thickness, while the remnant polarization and field-induced strain increase with film thickness. These trends are consistent with experimental results and verify that the effect of film thickness on remnant polarization strength and the coercive field should not be neglected. |
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| Keywords: | ferroelectric film film thickness stress hysteresis |
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