Surface Structures of Ce-Doped Ba0.6Sr0.4TiO3 Films by X-Ray Photoelectron Spectroscopy

被引：0

作者：

Liao Jiaxuan ^{[1
]}

Pan Xiaofeng ^{[1
]}

Wang Hongquan ^{[1
]}

Zhang Jia ^{[1
]}

Fu Xiangjun ^{[1
]}

Tian Zhong ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, Res Inst Elect Sci & Technol, Chengdu 610054, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2009年 / 38卷 / 11期

关键词：

cerium doping; barium strontium titanate film; perovskited structure; dielectric properties; DIELECTRIC-PROPERTIES; LAYER;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cerium (Ce)-doped barium strontium titanate (Ba0.6Sr0.4TiO3, BST) films and undoped BST films have been prepared by an improved Sol-gel method. The surface structures have been studied by X-ray photoelectron spectroscopy (XPS). The result reveals that the surface structures are composed of perovskited structure and non-perovskited structure, and the Cc doping significantly reduces the non-perovskited structure. It is by scanning electron microscope and atomic force microscope shown that the Ce-doped BST films are smooth and compact without crack or shrinkage cavity, which are associated with the formation of the non-perovskited structure. The voltage-capacitance curves demonstrate that the Ce-doped BST films have significant improvement in dielectric properties with a tunability of more than 60.8% at 40 voltage, and a dielectric loss (tan delta) of 0.0265 at zero bias. The improved mechanism of Ce doping is discussed.

引用

页码：1987 / 1991

页数：5

共 12 条

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