Ultrathin Non-Ising Charged Domain Walls Confined in BiFeO_3 Nanocrystals

Lisha Liu; Kun Xu; Qian LiYu HuangLiang ShuYue-Yu-Shan ChengSuwei ZhangJin LuoJing ZhuJing-Feng Li

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Ultrathin Non-Ising Charged Domain Walls Confined in BiFeO_3 Nanocrystals

机译：Ultrathin Non-Ising Charged Domain Walls Confined in BiFeO_3 Nanocrystals

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Rich functionalities have been identified for domain walls (DWs, naturallyoccurring interfaces in ferroics), e.g., enhanced conductance and photovoltaiceffect, which specify the interest in their internal structure. The dimension/width and type are of particular interest, which is the carrier of their functionality.Recent attention has been focused on head-to-head or tail-to-tail chargedDWs with greatly enhanced conductivity compared to the inner domains,which are found to be an order of magnitude thicker (tens of unit cells) thannormal neutral DWs. In this study, ultrathin non-Ising charged DWs arefound, where polarization switched their direction within 2–3 unit cells inself-assembled BiFeO_3 nanocrystals. An analytical model and finite elementmethod simulation are used to interpret the origin of this phenomenon, i.e.,electrostatic constraints linked to DW configurations in a ferroelectric. Thisstudy indicates that as an intrinsic property, the width of the ferroic DWsvaries with different electrostatic constraints and must be taken into considerationduring its applications.

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来源
《Advanced functional materials》 |2022年第46期|2207730.1-2207730.8|共8页
作者
Lisha Liu; Kun Xu; Qian LiYu HuangLiang ShuYue-Yu-Shan ChengSuwei ZhangJin LuoJing ZhuJing-Feng Li;
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作者单位

National Center for Electron Microscopy in BeijingThe State Key Laboratory of New Ceramics and Fine ProcessingKey Laboratory of Advanced Materials (MOE)School of Materials Science and EngineeringTsinghua UniversityBeijing 100084, P. R. China;

Ji Hua Labora;

State Key Laboratory of New Ceramics and Fine ProcessingSchool of Materials Science and EngineeringTsinghua UniversityBeijing 100084, P. R. China;

State Key Laboratory of New Ceramics and Fine ProcessingSchool of Materials Science and EngineeringTsinghua UniversityBeijing 100084, P. R. China;

School of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing 210094, P. R.;

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正文语种英语
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bismuth ferrite; domain walls; ferroelectrics; polarization;

Ultrathin Non-Ising Charged Domain Walls Confined in BiFeO_3 Nanocrystals

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