Annealing temperature dependence of ferromagnetism in Co-doped TiO2 nanofibres

被引：4
|
作者：
Jia, C. W. [1 ]
Xie, E. Q. [1 ]
Zhao, J. G. [1 ]
Duan, H. G. [1 ]
Zhang, Y. Z. [1 ]
机构：
[1] Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 2007年 / 140卷 / 1-2期
关键词：
cobalt; titanium dioxide; fibers; ANATASE TIO2; LUMINESCENCE; TRANSITION; FILMS;
D O I：
10.1016/j.mseb.2007.01.054
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Co-doped TiO2 nanofibres with an average diameter of similar to 70 nm were fabricated by electrospinning. The samples were annealed at different temperatures in air and SEM, XRD, VSM, PL were employed to characterize the samples. XRD measurements showed that the nanofibres present anatase and rutile phase at annealing temperature of 420 and 800 degrees C, respectively. It is found that the ferromagnetic moment of Co-doped TiO2 nanofibres decrease with increasing of annealing temperature. In addition, photoluminescence is different from that of pure TiO2 and the emission due to oxygen vacancies decrease with increasing of annealing temperature, indicating that oxygen vacancies may play an important role for ferromagnetism and F-center-mediated interaction between Co spins may be responsible for the creation of ferromagnetism in Co-doped TiO2 nanofibres. (C) 2007 Published by Elsevier B.V.
引用
收藏
页码：10 / 14
页数：5
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