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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Structure Model for Anion-Disordered Photochromic Gadolinium Oxyhydride Thin Films
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Structure Model for Anion-Disordered Photochromic Gadolinium Oxyhydride Thin Films

机译:阴离子无序光胆胆酸酐薄膜结构模型

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Rare-earth (RE) oxyhydride thin films prepared by reactive magnetron sputtering followed by air-oxidation show a color-neutral photochromic effect at ambient conditions within a wide composition range (REOxH3-2x where 0.5 <= x < 1.5). Due to the high degree of anion sublattice disorder present in these thin films, the structure models proposed for the related bulk materials are not directly applicable. Instead we use a combination of EXAFS analysis and lattice energy calculations to establish a fcc-based model linking the oxyhydrides to the related binary compounds. The oxide anions are found to occupy predominantly the tetrahedral sites in the fcc structure, which is attributed to electrostatic lattice energy minimization.
机译:通过反应磁控溅射制备的稀土(RE)氧化薄膜,然后是空气氧化,在宽组成范围内的环境条件下显示出色中性光致变色效果(Reoxh3-2X,其中0.5 <=×1.5)。 由于在这些薄膜中存在的高度阴离子子变差,所提出的用于相关散装材料的结构模型不可直接适用。 相反,我们使用EXAFS分析和晶格能量计算的组合来建立将氧化氢的基于FCC的模型与相关二元化合物连接。 发现氧化物阴离子主要占据FCC结构中的四面体位点,其归因于静电格子能量最小化。

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