文章基本信息

标题：Epitaxial growth of highly-crystalline spinel ferrite thin films on perovskite substrates for all-oxide devices
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作者：Jarrett A. Moyer ; Ran Gao ; Peter Schiffer 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
期号：1
DOI：10.1038/srep10363
语种：English
出版社：Springer Nature
摘要：The potential growth modes for epitaxial growth of Fe₃O₄ on SrTiO₃ (001) are investigated through control of the energetics of the pulsed-laser deposition growth process (via substrate temperature and laser fluence). We find that Fe₃O₄ grows epitaxially in three distinct growth modes: 2D-like, island, and 3D-to-2D, the last of which is characterized by films that begin growth in an island growth mode before progressing to a 2D growth mode. Films grown in the 2D-like and 3D-to-2D growth modes are atomically flat and partially strained, while films grown in the island growth mode are terminated in islands and fully relaxed. We find that the optimal structural, transport, and magnetic properties are obtained for films grown on the 2D-like/3D-to-2D growth regime boundary. The viability for including such thin films in perovskite-based all-oxide devices is demonstrated by growing a Fe₃O₄/La_0.7Sr_0.3MnO₃ spin valve epitaxially on SrTiO₃.