Optical and dielectric properties of CuAl2O4 films synthesized by solid-phase epitaxy

被引：17

作者：

Leu, L. C.

Norton, D. P.

Jellison, G. E., Jr.

Selvamanickam, V.

Xiong, X.

机构：

[1] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA

[2] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

[3] IGC Super Power LLC, Schenectady, NY 12304 USA

来源：

THIN SOLID FILMS | 2007年 / 515卷 / 17期

关键词：

CuAl2O4; solid-phase epitaxy; spinel; dielectrics; oxide;

D O I：

10.1016/j.tsf.2007.02.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The synthesis and properties of CuAl2O4 thin films have been examined. The CuAl2O4 films were deposited via reactive direct current magnetron sputter using a CuAl2 target. As-deposited films were amorphous. Post-deposition annealing at high temperature in oxygen yielded solid-phase epitaxy on MgO. The film orientation was cube-on-cube epitaxy on (001) MgO single-crystal substrates. The films were transparent to visible light. The band gap of crystalline CuAl2O4 was determined to be similar to 4 eV using a Tauc plot from the optical transmission spectrum. The dielectric constant of the amorphous films was determined to be similar to 20-23 at 1-100 kHz. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：6938 / 6942

页数：5

共 24 条

[1] New LiNiyCo1-2yMn1+yO4 spinel oxide solid solutions as 5 V electrode material for Li-ion batteries [J].