四方晶系
钙钛矿(结构)
结晶学
扫描透射电子显微镜
材料科学
晶体孪晶
透射电子显微镜
电子能量损失谱
电子衍射
微观结构
空位缺陷
晶体结构
衍射
化学
纳米技术
光学
物理
作者
Senne Van Rompaey,Walid Dachraoui,Stuart Turner,Olga Yu. Podyacheva,Haiyan Tan,Jo Verbeeck,Artem M. Abakumov,Joke Hadermann
出处
期刊:Zeitschrift für Kristallographie
[Oldenbourg Wissenschaftsverlag]
日期:2012-10-22
被引量:8
标识
DOI:10.1524/zkri.2013.1556
摘要
The crystal structure of SrCo 0.7 Fe 0.2 Nb 0.1 O 2.72 was determined using a combination of precession electron diffraction (PED), high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) and spatially resolved electron energy loss spectroscopy (STEM-EELS). The structure has a tetragonal P4/mmm symmetry with cell parameters a = b = a p , c = 2a p (a p being the cell parameter of the perovskite parent structure). Octahedral BO 2 layers alternate with the anion-deficient BO 1.4 layers, the different B cations are randomly distributed over both layers. The specific feature of the SrCo 0.7 Fe 0.2 Nb 0.1 O 2.72 microstructure is a presence of extensive nanoscale twinning resulting in domains with alignment of the tetragonal c-axis along all three cubic direction of the perovskite subcell.
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