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Optical and X-ray characterization of ferroelectric strontium-bismuth-tantalate (SBT) thin films

机译:铁电锶钽酸锶(SBT)薄膜的光学和X射线表征

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Metal-organic chemical vapor deposition (MOCVD) made layers of strontium-bismuth-tantalate (SBT) were characterized by spectroscopic ellipsometry (SE) using the Adachi model [S. Adachi, Phys. Rev. B 35 (1987) 7454-7463]. The evaluated optical parameters were correlated with the physical and chemical behavior examined by X-ray diffraction (XRD). As a result, it was possible to fit the measured spectra with the Adachi model in a wide range covering the region of the band gap. The Adachi model provides electronic layer parameters like the transition energy Eo and broadening F. Our investigations established a correlation between XRD-determined average grain size and the electronic layer parameters. (c) 2006 Elsevier B.V. All rights reserved.
机译:使用Adachi模型通过椭圆偏振光谱法(SE)对金属有机化学气相沉积(MOCVD)制备的钽酸锶铋铋(SBT)层进行了表征。足立区B 35(1987)7454-7463]。评估的光学参数与通过X射线衍射(XRD)检查的物理和化学行为相关。结果,有可能在覆盖带隙区域的宽范围内将测得的光谱与Adachi模型拟合。 Adachi模型提供了电子层参数,例如跃迁能Eo和展宽F。我们的研究确定了XRD确定的平均晶粒尺寸与电子层参数之间的相关性。 (c)2006 Elsevier B.V.保留所有权利。

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