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Optical and structural characterization of Ge clusters embedded in ZrO_2

机译:嵌入ZrO_2的Ge团簇的光学和结构表征。

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摘要

Graphical abstract Display Omitted Highlights Reference optical properties for ZrO2 and amorphous Ge extracted. Optical and structural properties of Ge nanoclusters in ZrO2 matrix. Investigation of surface region using medium energy ion scattering. Characterization of structural changes during annealing. Multi-layer optical models for ellipsometry. Abstract The change of optical and structural properties of Ge nanoclusters in ZrO2 matrix have been investigated by spectroscopic ellipsometry versus annealing temperatures. Radio-frequency top-down magnetron sputtering approach was used to produce the samples of different types, i.e. single-layers of pure Ge, pure ZrO2 and Ge-rich-ZrO2 as well as multi-layers stacked of 40 periods of 5-nm-Ge-rich-ZrO2 layers alternated by 5-nm-ZrO2 ones. Germanium nanoclusters in ZrO2 host were formed by rapid-thermal annealing at 600–800°C during 30s in nitrogen atmosphere. Reference optical properties for pure ZrO2 and pure Ge have been extracted using single-layer samples. As-deposited multi-layer structures can be perfectly modeled using the effective medium theory. However, annealed multi-layers demonstrated a significant diffusion of elements that was confirmed by medium energy ion scattering measurements. This fact prevents fitting of such annealed structure either by homogeneous or by periodic multi-layer models.
机译: 图形摘要 < ce:simple-para id =“ spar0005” view =“ all” /> 省略显示 突出显示 < ce:para id =“ p0005” view =“ all”> ZrO 2 和无定形Ge提取。 ZrO 2 矩阵中的Ge纳米团簇的光学和结构性质。< / ce:para> 使用中能离子散射研究表面区域。 退火过程中结构变化的特征。 用于椭偏术的多层光学模型。 摘要 ZrO中Ge纳米团簇的光学和结构性质的变化 2 <已经通过椭圆偏振光谱法对退火温度进行了研究。射频自顶向下磁控溅射法用于生产不同类型的样品,即纯Ge,纯ZrO 2 和富Ge的单层-ZrO 2 以及多层堆叠的40个5纳米5nm-Ge-rich-ZrO 2 层与5nm-ZrO 2 层交替排列。 ZrO 2 主体中的锗纳米团簇是通过在30 °C下进行快速热退火而形成的:hsp sp =“ 0.25” /> s在氮气气氛中。使用单层样品已提取了纯ZrO 2 和纯Ge的参考光学性质。沉积的多层结构可以使用有效介质理论完美建模。但是,退火的多层膜显示出元素的显着扩散,这已通过中等能量离子散射测量得到了证实。这个事实会阻止通过均匀或周期性多层模型拟合此类退火结构。

著录项

  • 来源
    《Applied Surface Science》 |2017年第ptab期|283-288|共6页
  • 作者单位

    Institute for Technical Physics and Materials Science (MFA), Center for Energy Research (EK), Hungarian Academy of Sciences (MTA);

    Institute for Technical Physics and Materials Science (MFA), Center for Energy Research (EK), Hungarian Academy of Sciences (MTA);

    International Institute for Accelerator Applications (IIAA), School of Computing and Engineering, University of Huddersfield;

    International Institute for Accelerator Applications (IIAA), School of Computing and Engineering, University of Huddersfield;

    Institute for Technical Physics and Materials Science (MFA), Center for Energy Research (EK), Hungarian Academy of Sciences (MTA);

    Institute of Applied Physics, TU Bergakademie Freiberg;

    V. Lashkaryov Institute of Semiconductor Physics;

    V. Lashkaryov Institute of Semiconductor Physics;

    V. Lashkaryov Institute of Semiconductor Physics;

    V. Lashkaryov Institute of Semiconductor Physics;

    Institute for Technical Physics and Materials Science (MFA), Center for Energy Research (EK), Hungarian Academy of Sciences (MTA);

    Institute of Applied Physics, TU Bergakademie Freiberg;

    Institute for Technical Physics and Materials Science (MFA), Center for Energy Research (EK), Hungarian Academy of Sciences (MTA);

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Spectroscopic ellipsometry; Ge nanoclusters; ZrO2; RF magnetron sputtering; Medium energy ion scattering;

    机译:椭圆偏振光谱法;Ge纳米团簇;ZrO2;射频磁控溅射;中能离子散射;

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