NBT-KBT单晶电性能和畴结构的组成和取向依赖性

2022 16th Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA) Pub Date : 2022-10-11 DOI:10.1109/SPAWDA56268.2022.10045943

Xun Zhou, Yang Wu, Saidong Xue, Xiangyong Zhao, Feifei Wang, Yanxue Tang, J. Jiao, Haosu Luo, Renbing Sun

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引用次数: 0

摘要

为了阐明a位无序Na0.5Bi0.5TiO3-K0.5Bi0.5TiO3 (NBT-KBT)单晶宏观铁电响应的纳米机制，利用压电响应力显微镜(PFM)系统地研究了其组成、电场和取向诱导的动态畴演化。结果表明，KBT含量的增加导致局部矫顽力场的减小，与宏观铁电性能一致。与(001)取向样品相比，(111)取向晶体在局部区域表现出较低的矫顽力场。原位温度域表征的不同表现说明了NBT-KBT在(001)和(111)取向上的电子传输能力的变化。

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Composition and Orientation Dependence of the Electrical Properties and Domain Structure for NBT-KBT Single Crystals

In order to elucidate the nano mechanism responsible for the macroscopic ferroelectric response of A-site disordered Na0.5Bi0.5TiO3-K0.5Bi0.5TiO3 (NBT-KBT) single crystals, the composition, electric-field and orientation induced dynamic domain evolution was investigated by piezoresponse force microscope (PFM) systematically. Results indicated the KBT contents increasing to morphotropic phase boundary (MPB) led to decrease the local coercive field, consist with the macroscopic ferroelectric performance. Compared to the (001) oriented sample, (111) oriented crystal shows a lower coercive field in the local regions. The different performance of in-situ temperature-dependent domain characterization illustrated the variation of electronic transmission capacity in (001) and (111) orientations of NBT-KBT.

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2022 16th Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)

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