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Crystal Structure and Atomic Arrangement of δ-Phase Sb-Te Binary Alloy

机译:δ相Sb-Te二元合金的晶体结构和原子排列

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The composition modulated Sb-Te binary thin films deposited by a RF sputtering method on SiO_2/Si substrates annealed through a rapid thermal annealing process and conducted a high-resolution transmission electron microscopy (HR-TEM) study in order to investigate the atomic arrangement of the δ-phase Sb-Te binary alloys which contain Te from 16 to 37 at. %. Through the comparison with HR-TEM image and diffraction patterns viewed along < 2110 > and < 1010 > direction, we have revealed that the ?-phase Sb-Te alloy crystallized into P3ml or R3m space group whether the number of layers is the multiple of three or not. We also expect from analogous Bi-Te system in earlier reports that as the Sb/Te ratio increases, total number of Sb layers in a unit cell increases. Therefore, based on above result, we suggested the atomic arrangement model composed of appropriate Sb_2 and Sb_2Te_3 layer and obtained simulated images of < 2110 > zone axis.
机译:通过射频溅射方法在经过快速热退火工艺退火的SiO_2 / Si衬底上沉积了成分调制的Sb-Te二元薄膜,并进行了高分辨率透射电子显微镜(HR-TEM)研究,以研究其原子排列。 δ相Sb-Te二元合金,其中Te含量为16至37 at。 %。通过与HR-TEM图像和沿<2110>和<1010>方向观察到的衍射图进行比较,我们发现,α-相Sb-Te合金结晶成P3ml或R3m空间群,无论层数是否为倍数。三分之二。我们还希望从早期的类似Bi-Te系统中发现,随着Sb / Te比值的增加,单位晶格中Sb层的总数也会增加。因此,基于以上结果,我们提出了由适当的Sb_2和Sb_2Te_3层组成的原子排列模型,并获得了<2110>区域轴的模拟图像。

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