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arXiv 2108.10243cond-mat.mtrl-sci
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畴尺寸和电荷缺陷对反铁电畴极化反转的影响

Domain size and charge defects on the polarization switching of antiferroelectric domains

Jinghao Zhu, Zhen Liu, Boyi Zhong, Yaojin Wang, Bai-Xiang Xu

摘要:

反铁电畴结构在外加电场作用下的开关行为尚未完全了解。本文利用相场模拟方法研究了反铁电畴的极化反转特性。结果表明,铁电畴优先在反铁电畴的边界处成核,且具有较大初始畴尺寸的反铁电体具有较高的矫顽电场,电滞回线表明了这一点.此外,我们引入电荷缺陷的样品和数值研究他们的影响。研究还表明,电荷缺陷可以诱导局域铁电畴,从而抑制饱和极化,缩小电滞回线的封闭区域。我们的研究结果为理解反铁电相变和优化实验中的储能性能提供了参考。

英文摘要:

The switching behavior of antiferroelectric domain structures under the applied electric field is not fully understood. In this work, by using the phase field simulation, we have studied the polarization switching property of antiferroelectric domains. Our results indicate that the ferroelectric domains nucleate preferably at the boundaries of the antiferroelectric domains, and antiferroelectrics with larger initial domain sizes possess a higher coercive electric field as demonstrated by hysteresis loops. Moreover, we introduced charge defects into the sample and numerically investigated their influence. It is also shown that charge defects can induce local ferroelectric domains, which could suppress the saturation polarization and narrow the enclosed area of the hysteresis loop. Our results give insights into understanding antiferroelectric phase transformation and optimizing the energy storage property in experiments.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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