The Orientation Transition and Control of REBaCu3Oy Films Grown by Liquid Phase Epitaxy,Crystal Growth & Design

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The Orientation Transition and Control of REBaCu3Oy Films Grown by Liquid Phase Epitaxy
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2021-09-22 , DOI: 10.1021/acs.cgd.1c00765
Simin Huang ₁ , Xin Yao _{1,

2}

Affiliation

Liquid phase epitaxy (LPE)-processed REBa₂Cu₃O_7-δ films, which possess single-crystalline properties, are of great significance to fundamental superconductor studies and practical applications. Performances of these films are related to their crystallographic orientations due to the notable anisotropy of coherent length along the a (and/or b) axis and c axis. Recently, an increasing number of experimental outcomes have proven that this preferential orientation is strongly dependent on the growth conditions. Based on those systematic results, the origin of crystallographic orientations is satisfactorily understood. Furthermore, attention has been directed toward tuning supersaturation for oriented film control, such as the pure a-axis oriented film (a-film), the pure c-axis oriented film (c-film), and some distinctive composite structures with superior performance for device applications. In order to provide universal guidance for artificial microstructure manipulation in LPE and significant insights for the development of film preparation, the mechanism of the a-/c-film formation related to thermodynamic and kinetic factors as well as the oriented growth control have been discussed in this review. Furthermore, the whole evolution model of oriented structures is also established, which may help researchers to better understand the films growth mechanism. Finally, the current challenges and future outlook on this flourishing topic have been suggested.

中文翻译：

液相外延生长REBaCu3Oy薄膜的取向转变及控制

液相外延 (LPE) 处理的 REBa ₂ Cu ₃ O _7-δ薄膜具有单晶特性，对基础超导体研究和实际应用具有重要意义。由于沿a (和/或b ) 轴和c的相干长度的显着各向异性，这些薄膜的性能与其晶体取向有关轴。最近，越来越多的实验结果证明这种优先取向强烈依赖于生长条件。基于这些系统的结果，晶体取向的起源得到了令人满意的理解。此外，注意力已经集中在用于取向膜控制的调整过饱和度，例如纯a轴取向膜（a- film ）、纯c轴取向膜（c- film ），以及一些具有优异性能的独特复合结构用于设备应用。为了提供对LPE人工微结构处理，制膜制剂的发展显著的见解，该机制普遍指导一-/ c -与热力学和动力学因素以及定向生长控制相关的膜形成已在本综述中进行了讨论。此外，还建立了定向结构的整体演化模型，有助于研究人员更好地理解薄膜的生长机制。最后，提出了这个蓬勃发展的主题的当前挑战和未来展望。

更新日期：2021-10-06

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