Structure and Magnetic Properties of Fe-Doped TiO2 Nano-Crystals by Nonaqueous Synthesis

Chu Feng Li; Ling Yue; Wen Jin; Ting Zhang; Huan Wang; Qiong Xu; Jia Wei Wang; Jing Shi; Rui Xiong; Di Yin

doi:10.4028/www.scientific.net/MSF.663-665.883

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HomeMaterials Science ForumMaterials Science Forum Vols. 663-665Structure and Magnetic Properties of Fe-Doped TiO2...

Structure and Magnetic Properties of Fe-Doped TiO₂ Nano-Crystals by Nonaqueous Synthesis

Abstract:

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 (Hc) 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.

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Materials Science Forum (Volumes 663-665)

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883-889

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.663-665.883

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Online since:

November 2010

Authors:

Chu Feng Li, Ling Yue, Wen Jin, Ting Zhang, Huan Wang, Qiong Xu, Jia Wei Wang, Jing Shi, Rui Xiong, Di Yin

Keywords:

Diluted Magnetic Semiconductor (DMS), Fe-Doped Anatase TiO₂, Magnetic Property, Nanocrystal, Nonaqueous Synthesis, Structure

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