Optical and magnetic properties of Co-doped TiO2 thin films grown by pulsed laser deposition

被引：13
作者：
Popovici, N.
Jimenez, E.
da Silva, R. C.
Branford, W. R.
Cohen, L. F.
Conde, O.
机构：
[1] Univ Lisbon, Fac Sci, Dept Phys, P-1749016 Lisbon, Portugal
[2] Inst Tecnol & Nucl, Dept Phys, P-2685 Sacavem, Portugal
[3] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2AZ, England
来源：
JOURNAL OF NON-CRYSTALLINE SOLIDS | 2006年 / 352卷 / 9-20期
关键词：
X-ray diffraction; laser deposition; magnetic properties; absorption; titanates;
D O I：
10.1016/j.jnoncrysol.2005.10.036
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Co-doped TiO2 thin films were grown by pulsed laser deposition onto (0 0 0 1)Al2O3 substrates, heated at 310 degrees C, using a KrF excimer laser. The ablation of polycrystalline targets of TiO2 rutile containing a few mol% of Co3O4 was performed in a background gas mixture of argon and hydrogen at total pressure of 10 Pa, for H-2 flow rates of 0.0, 0.1 and 0.2 sccm. X-ray diffraction analysis showed that the as-deposited films consist of TiO2 rutile-based nanocrystallites with preferred orientation along the [1 0 1] direction. The chemical composition of the samples was evaluated by Rutherford backscattering measurements, revealing that Ti distribution is homogeneous on the surface and along film depth, and that the Co:Ti ratio is 0.03:0.97 for all the films investigated. In this paper, we focus on the influence of hydrogen addition to argon background gas on the optical properties of the Co-doped TiO2 films. Results of magnetic characterisation will also be presented. (c) 2006 Elsevier B.V. All rights reserved.
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页码：1486 / 1489
页数：4
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