Effects of electrostatic field strength on grain‐boundary core structures in SrTiO 3
Effects of electrostatic field strength on grain‐boundary core structures in SrTiO
3
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静电场强度对SrTiO 3 晶界核结构的影响
DOI：
10.1111/jace.16344
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发表时间：
2019
影响因子：
3.9
通讯作者：
K. Benthem
中科院分区：
文献类型：
--
作者：
L. Hughes;K. Benthem
了解外加电场与纳米陶瓷界面结构之间的相互作用对控制纳米陶瓷的功能特性具有重要意义。在陶瓷氧化物中，功能性质由晶界核心结构附近和内部的氧空位浓度决定。本研究表明，在双晶扩散键合过程中施加0 ~ 170 V/cm的静电场改变了SrTiO3中（100）扭转晶界的原子和电子核心结构。外加电场强度影响局部氧空位浓度和氧亚晶格的有序度。该模型系统的结果表明，在陶瓷制造过程中施加的静电场可以作为一种新的加工参数来定制缺陷结构构型，从而获得前所未有的陶瓷微观结构。在没有任何烧结添加剂的情况下，用电场操纵界面结构的能力可能对调整电陶瓷中的极化和能带结构具有深远的意义，同时避免了通常不需要的掺杂剂的影响。
Understanding interactions between externally applied electric fields and the interfacial structures of nanoscale ceramics is important for controlling their functional properties. In ceramic oxides, functional properties are determined by oxygen vacancy concentrations near and within grain‐boundary core structures. In this study it is shown that the application of electrostatic fields ranging from 0 to nominally 170 V/cm during diffusion bonding of bicrystals alters the atomic and electronic core structures of (100) twist grain boundaries in SrTiO3. The applied electric field strength affects local oxygen vacancy concentrations and ordering of the oxygen sublattice. Results for this model system indicate that electrostatic fields applied during ceramic manufacturing can be employed as a new processing parameter to tailor defect structure configurations and obtain unprecedented ceramic microstructures. The ability to manipulate interface configurations with electric fields in the absence of any sintering additives may have far reaching implications for tuning polarization and band structures in electroceramics while avoiding effects of often unwanted dopants.
影响因子：
3.7
作者：
Hanzig, Juliane;Zschornak, Matthias;Meyer, Dirk C.
通讯作者：
Meyer, Dirk C.
钛酸锶近表面区域可逆电场引起的结构变化
影响因子：
1.1
作者：
M. Bobeth;N. Farag;A. A. Levin;D. C. Meyer;W. Pompe;A. E. Romanov
通讯作者：
A. E. Romanov