Effects of processing parameters on the morphologies of complex sesquioxide thin films

倍半氧化物 材料科学 微晶 薄膜 辉长岩 结晶度 基质(水族馆) 单斜晶系 溅射沉积 扫描电子显微镜 化学工程 相(物质) 氧化物 分析化学(期刊) 结晶学 纳米技术 溅射 晶体结构 复合材料 冶金 化学 工程类 海洋学 有机化学 色谱法 地质学
作者
Sofia Pinzon,James A. Valdez,Vancho Kocevski,Jon K. Baldwin,Blas P. Uberuaga,Cortney R. Kreller,Benjamin K. Derby
出处
期刊:Journal of vacuum science & technology [American Institute of Physics]
卷期号:41 (3)
标识
DOI:10.1116/6.0002398
摘要

Controlling and predicting the morphology of lanthanide sesquioxides in thin film form is vital to their use in current applications. In the present study, single and codeposited Sm2O3, Er2O3, and Lu2O3 thin films were grown on yttria-stabilized zirconia (8%) substrates by radio frequency magnetron sputtering at room temperature and 500 °C. The effect of two different substrate temperatures and altering the oxide cation on the structural and morphological properties of the films was analyzed. The thin films were characterized by profilometry, scanning electron microscopy, transmission electron microscopy, and x-ray diffraction. The single-component Lu2O3 and Sm2O3 films obtained were of the cubic phase, and the Er2O3 was a mix of cubic and monoclinic phases. It was observed for both the Er2O3 and Lu2O3 films that increasing the substrate temperature to 500 °C resulted in larger grained polycrystalline films. In contrast, large grained polycrystalline films were obtained at both room temperature and 500 °C for Sm2O3 and uneven granularity increased as temperature increased. Codeposition of Lu2O3 and Sm2O3, and Lu2O3 and Er2O3 resulted in a cubic bixbyite phase (the C phase of the lanthanide sesquioxide) solid solution. It was observed that the structure and morphology of the films can be controlled by manipulating deposition parameters. Both substrate temperature and altering the oxide cation contributed to changes in crystallinity and grain structure, which can modify the chemical and physical properties of the films for their applications.

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