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首页> 外文期刊>Crystal growth & design >(100)-oriented SrTiO_3/BaTiO_3 artificial superlattices fabricated by chemical solution deposition
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(100)-oriented SrTiO_3/BaTiO_3 artificial superlattices fabricated by chemical solution deposition

机译：化学溶液沉积制备（100）取向的SrTiO_3 / BaTiO_3人工超晶格

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摘要

Epitaxially grown SrTiO_3(100)/BaTiO_3(100) artificial superlattices with 7-nm-thick layers were synthesized on (100) platinum-coated (100) magnesium oxide substrates by a chemical solution deposition method. High-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) revealed cube-on-cube epitaxial growth. The Z-contrast HAADF-STEM image indicated that the SrTiO_3 and BaTiO_3 layers were fabricated without the intermixing of A-site atoms. The defects can only be observed in the boundary between the SrTiO_3 and BaTiO_3 layers. There was a mismatch of 3.0% between the in-plane lattice parameters of the SrTiO_3 and BaTiO_3 layers. This lattice mismatch induced the defects between the SrTiO_3 and BaTiO_3 layers. Inducing the defects between the layers relaxed the misfit strain.
机译：通过化学溶液沉积法在（100）铂涂层（100）氧化镁基板上合成了具有7nm厚层的外延生长SrTiO_3（100）/ BaTiO_3（100）人造超晶格。高角度环形暗场扫描透射电子显微镜（HAADF-STEM）显示了立方对立方外延生长。 Z对比HAADF-STEM图像表明，在不混合A位原子的情况下制备了SrTiO_3和BaTiO_3层。只能在SrTiO_3和BaTiO_3层之间的边界中观察到缺陷。 SrTiO_3和BaTiO_3层的面内晶格参数之间存在3.0％的不匹配。这种晶格失配引起了SrTiO_3和BaTiO_3层之间的缺陷。在层之间引起缺陷可以缓解失配应变。

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