Abstract A non-linearly decreasing piezoelectric coefficient with an external electric field is an intrinsic property of a fully poled ferroelectric film, which has been observed in the measured longitudinal piezoelectric responses. However, for transverse piezoelectric responses, the observed converse piezoelectric coefficients (e31,f) have displayed a different trend. Here we show that this disagreement can be rationally resolved by utilizing a small field e31,f test under a sweeping direct current bias voltage, in which the field-dependent transverse piezoelectric response of a (001)-film is analyzed in a stepwise manner. Understanding of this nonlinear field-dependence will help improve the design of transverse piezoelectric devices.

中文翻译：

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(001) 铁电薄膜中横向压电响应的非线性电场依赖性

摘要 压电系数随外部电场非线性递减是全极化铁电薄膜的固有特性，已在测量的纵向压电响应中观察到。然而，对于横向压电响应，观察到的逆压电系数 (e31,f) 显示出不同的趋势。在这里，我们表明可以通过在扫描直流偏置电压下利用小场 e31,f 测试合理解决这种分歧，其中以逐步方式分析 (001) 膜的场相关横向压电响应。了解这种非线性场相关性将有助于改进横向压电器件的设计。