Property Regulation Principle in Mn-Doped BF–BT Ceramics: Competitive Control of Domain Switching By Defect Dipoles and Domain Configuration,Advanced Electronic Materials

当前位置： X-MOL 学术 › Adv. Electron. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Property Regulation Principle in Mn-Doped BF–BT Ceramics: Competitive Control of Domain Switching By Defect Dipoles and Domain Configuration
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2022-08-03 , DOI: 10.1002/aelm.202200609
Bing Li ₁ , Chongyang Li ₁ , Ting Zheng ₁ , Jiagang Wu ₁

Affiliation

Mn-doping is reported to be an effective strategy to obtain better electrical property in bismuth ferrite-barium titanate (BF-BT)-based ceramics, while the property regulation principle and its potential physical mechanism is still poorly understood. For disclose the veil of Mn-doping enhancing properties, the typical material system BF-BT–xMnO₂ mol% is designed and the effects of Mn-doping on multilevel structures and external fields stimulated electrical properties are deeply investigated. Mn-doping induced structure disorder and defect dipoles lead to the formation of nanodomain and the variation of local structure, contributing to intrinsic enhancement of polarization. Especially, electrical properties under different electric and temperature fields reveal that there is a competitive control of domain switching by defects and domain configuration, which is also verified by domain writing technology and switching spectroscopy piezore-sponse force microscopy. That is, the defect dipoles have pinning effect on domain to hinder domain switching, leading to smaller polarization and indistinctive electrostrain at low fields. While the nanodomain reduces intrinsic coercive field and promotes domain switching, generating much larger polarization and electrostrain at high fields. lt is believed the decoding of domain switching behavior controlled by defect and domain can provide a paradigm to understand the property evolution in chemically modified BF-BT.

中文翻译：

Mn掺杂BF-BT陶瓷的性质调节原理：缺陷偶极子和畴配置对畴切换的竞争控制

据报道，Mn掺杂是获得更好的铁酸铋-钛酸钡（BF-BT）基陶瓷电性能的有效策略，但其性能调控原理及其潜在的物理机制仍知之甚少。为了揭示Mn掺杂增强性能的面纱，典型的材料体系BF-BT- x MnO ₂设计了 mol% 并深入研究了 Mn 掺杂对多能级结构和外场激发电性能的影响。Mn掺杂引起的结构无序和缺陷偶极子导致纳米域的形成和局部结构的变化，有助于极化的内在增强。特别是不同电场和温度场下的电学特性表明，缺陷和畴配置对畴切换存在竞争性控制，这也通过畴写入技术和切换光谱压电响应力显微镜得到验证。也就是说，缺陷偶极子在畴上具有钉扎效应，阻碍畴的切换，导致极化更小，在低场时电应变不明显。虽然纳米域降低了固有矫顽场并促进了域切换，但在高场下产生了更大的极化和电应变。相信通过缺陷和域控制的域切换行为的解码可以为理解化学改性的BF-BT的性质演变提供一个范式。

更新日期：2022-08-03

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11