Influence of transition metal doping on the structural, optical, and magnetic properties of TiO2 films deposited on Si substrates by a sol-gel process

被引：46

作者：

Tian J. ^{[1
,2
]}

Gao H. ^{[1
]}

Kong H. ^{[2
]}

Yang P. ^{[2
]}

Zhang W. ^{[1
]}

Chu J. ^{[2
]}

机构：

[1] School of Physics and Electronics, Henan University

[2] Key Laboratory of Polar Materials and Devices, Ministry of Education, East China Normal University, 500 Dongchuan Road

来源：

Tian, J. (tjj@henu.edu.cn) | 1600年 / Springer Science and Business Media, LLC卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Diluted magnetic semiconductors; Magnetic property; Optical property; Phase transformation;

D O I：

10.1186/1556-276X-8-533

中图分类号：

学科分类号：

摘要：

Transition metal (TM)-doped TiO2 films (TM = Co, Ni, and Fe) were deposited on Si(100) substrates by a sol-gel method. With the same dopant content, Co dopants catalyze the anatase-to-rutile transformation (ART) more obviously than Ni and Fe doping. This is attributed to the different strain energy induced by the different dopants. The optical properties of TM-doped TiO2 films were studied with spectroscopic ellipsometry data. With increasing dopant content, the optical band gap (EOBG) shifts to lower energy. With the same dopant content, the EOBG of Co-doped TiO2 film is the smallest and that of Fe-doped TiO2 film is the largest. The results are related to electric disorder due to the ART. Ferromagnetic behaviors were clearly observed for TM-doped TiO2 films except the undoped TiO2 film which is weakly magnetic. Additionally, it is found that the magnetizations of the TM-doped TiO2 films decrease with increasing dopant content. © 2013 Tian et al.; licensee Springer.

引用

页码：1 / 11

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