High tunability in compositionally graded epitaxial barium strontium titanate thin films by pulsed-laser deposition

被引：141

作者：

Lu, SG ^{[1
]}

Zhu, XH

Mak, CL

Wong, KH

Chan, HLW

Choy, CL

机构：

[1] Hong Kong Polytech Univ, Dept Appl Phys, Kowloon, Hong Kong, Peoples R China

[2] Hong Kong Polytech Univ, Mat Res Ctr, Kowloon, Hong Kong, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2003年 / 82卷 / 17期

关键词：

D O I：

10.1063/1.1569427

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Compositionally graded barium strontium titanate [(BaxSr1-x)TiO3-BST, x=0.75, 0.8, 0.9, and 1.0] thin films are fabricated by pulsed-laser deposition on a LaAlO3 substrate with (La0.7Sr0.3)MnO3 as the bottom electrode. A high dielectric permittivity and temperature characteristic without Curie-Weiss law are obtained. A tunability of over 70% is obtained at frequency of 1 MHz, which is higher than that of single BST layer with the same compositions. All the results indicate that the graded thin films have better electrical properties than a single-layer film. (C) 2003 American Institute of Physics.

引用

页码：2877 / 2879

页数：3

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