The actual ferroelectric polarization can be misjudged due to the existence of the leakage current. How to distinguish the impact of each part is of great significance to evaluate the actual domain switching polarization and liner polarization. The current (I)–electric field (E) curves are suggested to distinguish the electric displacement contribution of electric conductivity D1, dielectric displacement D2 and domain switching polarization P. However, the previous model cannot accurately estimate the contribution of each part due to the inaccurate assumption. Thus, an alternative model had been constructed to demonstrate respective contributions of D1, D2 and P. Through the I–E curves, one baseline was made from the vertex (I > 0) at negative maximum electric field to another vertex (I > 0) at the positive and maximum electric field. The area above the baseline represents the domain switching P by high-order even power. The areas enclosed by I–E curve, baseline, and I = 0 line represent the contribution of electric conductivity. Besides, the parallelogram area represents the contribution of dielectric displacement D2. The accuracy of the present model had been verified by the simulation mean and fabrication in traditional BaTiO3 ferroelectric films. It shows that the contribution of electric conductivity D1 is two times than actual contribution by previous model, and dielectric displacement D2 is of great error than the actual one. And the present model is in more accordance with the actual contribution by constructing more accurate conductance form, and there is only small error in present model. It is revealed that the present model is more suitable to distinguish the contribution of each part than the previous one.

中文翻译：

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贡献的修改：铁电磁滞回线中的电导率、介电位移和域切换

由于漏电流的存在，可能会误判实际的铁电极化。如何区分各部分的影响，对于评估实际的域切换极化和线极化具有重要意义。建议使用电流 (I)-电场 (E) 曲线来区分电导率 D1、介电位移 D2 和域切换极化 P 的电位移贡献。 然而，由于之前的模型无法准确估计每个部分的贡献不准确的假设。因此，已经构建了一个替代模型来证明 D1、D2 和 P 各自的贡献。 通过 I-E 曲线，一个基线是从负最大电场的顶点 (I > 0) 到另一个顶点 (I > 0 ) 在正电场和最大电场。基线上方的区域代表高阶偶次幂的域切换 P。由 I-E 曲线、基线和 I = 0 线包围的区域代表电导率的贡献。此外，平行四边形面积代表介电位移D2的贡献。该模型的准确性已通过模拟手段和传统 BaTiO3 铁电薄膜的制作得到验证。结果表明，电导率D1的贡献是先前模型实际贡献的两倍，而介电位移D2与实际贡献的误差较大。并且本模型通过构建更准确的电导形式更符合实际贡献，且仅存在较小误差。