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arXiv 2008.06419cond-mat.mtrl-sciphysics.ins-det
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氧化物薄膜材料相变的光学识别

Optical Identification of Materials Transformations in Oxide Thin Films

Duncan R. Sutherland, Aine Boyer Connolly, Maximilian Amsler, Ming-Chiang Chang, Katie Rose Gann, Vidit Gupta, Sebastian Ament, Dan Guevarra, John M. Gregoire, … 展开作者

Duncan R. Sutherland, Aine Boyer Connolly, Maximilian Amsler, Ming-Chiang Chang, Katie Rose Gann, Vidit Gupta, Sebastian Ament, Dan Guevarra, John M. Gregoire, Carla P. Gomes, R. B. van Dover, Michael O. Thompson

摘要:

组合研究的高通量实验的最新进展加速了在广泛的组合物和合成条件下材料的发现和分析。然而,许多更强大的表征方法受到速度、成本、可用性和/或分辨率的限制。为了有效地利用这些方法,有价值的开发方法,用于确定关键的组成和条件,作为先验知识,后续表征与高精度技术,如微米级同步加速器的X射线衍射(XRD)。在这里,我们演示了使用光学显微镜和反射光谱,以确定可能的相变边界的薄膜库。这些方法用于描绘氧化物材料的横向梯度激光尖峰退火(lg-LSA)之后可能的亚稳相边界。然后将边界集与使用高分辨率XRD获得的结构转变的确定性测定进行比较。我们表明,光学方法检测到超过95%的组成梯度的La-Mn-O库和Ga $_2$ O $_3$样品中的结构转变,都受到广泛的一组lg-LSA退火。我们的研究结果提供了定量支持的价值光学检测转换作为先验数据,以指导后续的结构表征,最终加速和提高$μ$ m分辨率XRD实验的有效实施。

英文摘要:

Recent advances in high-throughput experimentation for combinatorial studies have accelerated the discovery and analysis of materials across a wide range of compositions and synthesis conditions. However, many of the more powerful characterization methods are limited by speed, cost, availability, and/or resolution. To make efficient use of these methods, there is value in developing approaches for identifying critical compositions and conditions to be used as a-priori knowledge for follow-up characterization with high-precision techniques, such as micron-scale synchrotron based X-ray diffraction (XRD). Here we demonstrate the use of optical microscopy and reflectance spectroscopy to identify likely phase-change boundaries in thin film libraries. These methods are used to delineate possible metastable phase boundaries following lateral-gradient Laser Spike Annealing (lg-LSA) of oxide materials. The set of boundaries are then compared with definitive determinations of structural transformations obtained using high-resolution XRD. We demonstrate that the optical methods detect more than 95% of the structural transformations in a composition-gradient La-Mn-O library and a Ga$_2$O$_3$ sample, both subject to an extensive set of lg-LSA anneals. Our results provide quantitative support for the value of optically-detected transformations as a priori data to guide subsequent structural characterization, ultimately accelerating and enhancing the efficient implementation of $μ$m-resolution XRD experiments.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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