Growth, structure, and thermal stability of epitaxial BaTiO3 films on Pt(111)

被引：19
作者：
Forster, Stefan [1 ]
Widdra, Wolf [1 ]
机构：
[1] Univ Halle Wittenberg, Inst Phys, Halle, Germany
来源：
SURFACE SCIENCE | 2010年 / 604卷 / 23-24期
关键词：
Surface structure; Epitaxial thin films; BaTiO3(111); Low energy electron diffraction (LEED); Scanning tunneling microscopy (STM); X ray photoelectron spectroscopy (XPS); SCANNING-TUNNELING-MICROSCOPY; THIN-FILMS; PHOTOELECTRON-SPECTROSCOPY; SURFACE; FERROELECTRICITY; LEED; NANOSCALE; SRTIO3;
D O I：
10.1016/j.susc.2010.09.009
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The growth of epitaxial ultrathin BaTiO3 films upon rf magnetron sputter deposition on a Pt(111) substrate has been studied by scanning tunnelling microscopy low-energy electron diffraction and X-ray photoelectron spectroscopy The BaTiO3 films have been characterized from the initial stages of growth up to a film thickness of 4 unit cells The deposited films develop a long-range order upon annealing at 1050 K in UHV In the submonolayer regime a wetting layer is formed on Pt(111) Thicker films reveal a Stranski-Krastanov-like structure as observed with STM By XPS a good agreement of the thin film stoichiometry with BaTiO3 single crystal data is determined Due to annealing at 1150 K BaTiO3 forms large two dimensional islands on the Pt(111) substrate Different surface structures develop on the islands depending on the O-2 partial pressure during annealing (C) 2010 Elsevier B V All rights reserved
引用
收藏
页码：2163 / 2169
页数：7
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