Labyrinth-type domain structure of heteroepitaxial SrMnO2.5 film
Labyrinth-type domain structure of heteroepitaxial SrMnO2.5 film
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DOI：
10.1063/1.4811152
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发表时间：
2013-06-10
影响因子：
4
通讯作者：
Yamamoto, Takahisa
中科院分区：
文献类型：
--
作者：
Kobayashi, Shunsuke;Ikuhara, Yuichi;Yamamoto, Takahisa
制备了在SrTiO3和LSAT基底上生长的SrMnO2.5薄膜，并通过扫描透射电镜环形明场成像直接证实了薄膜中的氧空位。SrMnO2.5薄膜呈现出独特的迷宫状畴，即迷宫型畴结构，这是由晶格错配引起的应变松弛引起的。用估计失配位错平均距离的几何关系解释了畴宽的变化规律。我们提出了控制域结构的有用原理，以期潜在的实际应用。(C) 2013 AIP出版有限责任公司
SrMnO2.5 films grown on SrTiO3 and LSAT substrates were prepared and oxygen vacancies in the films were directly confirmed by annular bright-field imaging in a scanning transmission electron microscope. The SrMnO2.5 films show a unique maze like pattern of domains, i.e., a labyrinth-type domain structure, that arises from relaxation of strain induced by lattice mismatches. The behavior of the domain widths is explained by the geometrical relationship for estimating of the average distance of misfit dislocations. We present useful principles for controlling the domain structures with a view to potential practical applications. (C) 2013 AIP Publishing LLC.