Structural, optical, and magnetic properties of polycrystalline Co-doped TiO2 synthesized by solid-state method

被引：27
作者：
Bouaine, Abdelhamid [1 ,2 ]
Schmerber, G. [2 ]
Ihiawakrim, D. [2 ]
Derory, A. [2 ]
机构：
[1] Univ Jijel, Dept Phys, LEM, Fac Sci Exactes & Sci Nat & Vie, Jijel 18000, Algeria
[2] UdS, CNRS, UMR 7504, IPCMS, F-67034 Strasbourg 2, France
来源：
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2012年 / 177卷 / 18期
关键词：
TiO2; Diluted magnetic semiconductors; Magnetic properties; THIN-FILMS; SEMICONDUCTORS; FERROMAGNETISM; COTIO3;
D O I：
10.1016/j.mseb.2012.08.014
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have used a solid-state method to synthesize polycrystalline Co-doped TiO2 diluted magnetic semiconductors (DMSs) with Co concentrations of 0, and 0.5 at.%. X-ray diffraction patterns reveal that Co doped TiO2 crystallizes in the rutile tetragonal structure with no additional peaks. Transmission electron microscopy (TEM) did not indicate the presence of magnetic parasitic phases and confirmed that Co ions are uniformly distributed inside the samples. Optical absorbance measurements showed an energy band gap which decreases after doping with the Co atoms into the TiO2 matrix. Magnetization measurements revealed a paramagnetic behavior for the as-prepared Co-doped TiO2 and a ferromagnetic behavior for the same samples after annealed under a mixture of H-2/N-2 atmosphere. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：1618 / 1622
页数：5
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