期刊
JOURNAL OF PHYSICS D-APPLIED PHYSICS
卷 55, 期 22, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1361-6463/ac570d
关键词
flexible oxide heterostructures; La0.7Sr0.3MnO3; mica substrate; pulsed laser deposition
资金
- National Natural Science Foundation of China [51772200, 11774172, 5217020745, 9216310165, 52102177]
- National Natural Science Foundation of Jiangsu Province [BK20210313]
- Jiangsu Specially-Appointed Professor Program
- Top-notch Academic Programs Project of Jiangsu Higher Education Institutions (TAPP)
- US National Science Foundation [DMR-1809520, DMR2016453]
This study successfully grew (110)-oriented LSMO thin films on mica substrates and demonstrated the domain matching epitaxial growth mechanism based on van der Waals epitaxy. The thin films exhibited decent ferromagnetic properties, providing a new pathway for fabricating functional oxide thin films on flexible mica substrates.
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 La0.7Sr0.3MnO3 (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.
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