Structure and Magnetic Properties of Fe-doped TiO2 Nano-crystals by Nonaqueous Synthesis

被引：0
作者：
Li, Chufeng [1 ,2 ]
Yue, Ling [1 ,2 ]
Jin, Wen
Zhang, Ting
Wang, Huan
Xu, Qiong
Wang, Jiawei
Shi, Jing
Xiong, Rui [1 ,2 ]
Yin, Di [1 ,2 ]
机构：
[1] Wuhan Univ, Minist Educ, Key Lab Artificial Micro & Nanostruct, Wuhan 430072, Peoples R China
[2] Wuhan Univ, Polymer Opto Elect Mat, Hubei Key Lab Organ, Wuhan 430072, Peoples R China
来源：
OPTOELECTRONIC MATERIALS, PTS 1AND 2 | 2010年 / 663-665卷
关键词：
Structure; Magnetic properties; Fe-doped anatase TiO2; Nonaqueous Synthesis; Nanocrystals; Diluted Magnetic Semiconductor; FERROMAGNETISM;
D O I：
10.4028/www.scientific.net/MSF.663-665.883
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Ti1-xFexO2 nanocrystals with x = 0.01, 0.02, 0.03 were prepared via a nonaqueous synthesis route. X-ray diffraction, transmission electron microscopy and high resolution transmission electron microscopy characterization confirmed the formation of anatase-phase nanocrystals with the average crystallite sizes of around 10 nm. The lattice constants alternate with the increase of the Fe content and no iron clusters were generated. X-ray photoelectron spectroscopy measurements showed that the substitutional Fe ions present mainly the valence of +3. The magnetic hysteresis loops measured at room temperature (RT) 300K showed that all the doped samples are atypically ferromagnetic, and the coercivity (H-c) of all the Fe-doping samples is around 0.1 T. An interpretation for the intrinsic RT ferromagnetism is put up based on the free carriers and defects induced interaction between Fe3+ ions.
引用
收藏
页码：883 / +
页数：2
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