Structure and microstructure of epitaxial Sr n Fe n O3 n −1 films
Structure and microstructure of epitaxial Sr n Fe n O3 n −1 films
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外延Sr n Fe n O3 n -1 薄膜的结构和显微结构
DOI：
10.1080/14786430412331313187
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发表时间：
2004
影响因子：
1.6
通讯作者：
M. Takano
中科院分区：
文献类型：
--
作者：
O. I. Lebedev †;J. Verbeeck;G. van Tendeloo;N. Hayashi;T. Terashima;M. Takano
采用脉冲激光沉积法在(LaAlO_3)_(0.3)(SrAl_(0.5)TaO_3)_(0.7)(LSAT)衬底上生长了SrFeO_3- − _x(0- ≤ _x- ≤ _(0.5))(SFO)薄膜，用电子衍射仪和高分辨电子显微镜研究了不同氧处理条件下薄膜的结构。在沉积和生长后的氧化过程中，氧还原的SFO薄膜沿四面体的层接受额外的氧气，以最小化弹性应变能。氧化过程在浓度SFO2.875和/或SFO2.75处停止，因为达到与LSAT衬底的零失配。提出了一种可能的生长机制和相变机制。非氧化膜表现出具有局部钙钛矿型结构的孪晶界，标称成分接近SFO_3。
Thin films of SrFeO3 − x (0 ≤ x ≤ 0.5) (SFO) grown on a (LaAlO3)0.3 (SrAl0.5Ta0.5O3)0.7 (LSAT) substrate by pulsed laser deposition have been structurally investigated by electron diffraction and high resolution transmission electron microscopy for different post-deposition oxygen treatments. During the deposition and post-growth oxidation, the oxygen-reduced SFO films accept extra oxygen along the tetrahedral layers to minimize the elastic strain energy. The oxidation process stops at a concentration SFO2.875 and/or SFO2.75 because a zero misfit with the LSAT substrate is reached. A possible growth mechanism and phase transition mechanism are suggested. The non-oxidized films exhibit twin boundaries having a local perovskite-type structure with a nominal composition close to SFO3.
DOI：
10.1007/bf01303701
发表时间：
1986-01-01
期刊：
ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER
影响因子：
--
作者：
BEDNORZ, JG;MULLER, KA
通讯作者：
MULLER, KA
影响因子：
3.3
作者：
Hodges, JP;Short, S;Kimball, CW
通讯作者：
Kimball, CW