Epitaxial (110)-oriented La 0.7 Sr 0.3 MnO 3 film directly on flexible mica substrate
Epitaxial (110)-oriented La 0.7 Sr 0.3 MnO 3 film directly on flexible mica substrate
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直接在柔性云母基板上外延 (110) 取向 La 0.7 Sr 0.3 MnO 3 薄膜
DOI：
10.1088/1361-6463/ac570d
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Li, Weiwei
中科院分区：
文献类型：
--
作者：
Ye, Lianxu;Zhang, Di;Lu, Juanjuan;Xu, Sicheng;Xu, Ruixing;Fan, Jiyu;Tang, Rujun;Wang, Haiyan;Guo, Haizhong;Li, Weiwei
钙钛矿云母范德华外延异质结构的制造和表征是实现柔性器件应用的关键一步。然而，迄今为止，在云母基底上生长的范德华外延结构的制造和研究主要限于（111）取向的钙钛矿功能氧化物薄膜，并且非常需要缓冲层。在这项工作中，我们直接在云母基底上生长La 0.7 Sr 0.3 MnO 3 (LSMO)薄膜，而不使用任何缓冲层。通过X射线衍射仪和扫描透射电子显微镜的表征，我们证明了（110）取向LSMO薄膜在云母基板上的外延生长。通过范德华外延在云母衬底上生长的LSMO薄膜采用域匹配外延代替传统的晶格匹配外延。利用Visualization for Electronic and Structural Analysis软件勾画并讨论了LSMO薄膜与云母基板之间的两种域匹配关系。 (110) 取向的 LSMO 薄膜保留了良好的铁磁性。我们的工作展示了一种直接在柔性云母基板上制造（110）取向的功能性氧化物薄膜的新途径。
Manufacture and characterizations of perovskite-mica van der Waals epitaxy heterostructures are a critical step to realize the application of flexible devices. However, the fabrication and investigation of the van der Waals epitaxy architectures grown on mica substrates are mainly limited to (111)-oriented perovskite functional oxide thin films up to now and buffer layers are highly needed. In this work, we directly grew La 0.7 Sr 0.3 MnO 3 (LSMO) thin films on mica substrates without using any buffer layer. By the characterizations of x-ray diffractometer and scanning transmission electron microscopy, we demonstrate the epitaxial growth of the (110)-oriented LSMO thin film on the mica substrate. The LSMO thin film grown on the mica substrate via van der Waals epitaxy adopts domain matching epitaxy instead of conventional lattice matching epitaxy. Two kinds of domain matching relationships between the LSMO thin film and mica substrate are sketched by Visualization for Electronic and STructural Analysis software and discussed. A decent ferromagnetism retains in the (110)-oriented LSMO thin film. Our work demonstrates a new pathway to fabricate (110)-oriented functional oxide thin films on flexible mica substrates directly.