| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1621471 | Journal of Alloys and Compounds | 2010 | 6 Pages |
Abstract
Ti1âxVxO2 nanocrystals were prepared by employing a novel and water-soluble precursor via hydrothermal method, and the microstructure and magnetic properties have been investigated. All the samples belong to a pure anatase structure and exhibit room-temperature ferromagnetism (RTFM) without any trace of vanadium oxides or clusters. After V doping, the anatase structure is retained, while crystal growth is restrained. The homogenous distribution of V, in V4+ chemical state, in TiO2 lattice is confirmed by X-ray powder diffraction (XRD), energy-dispersive X-ray spectra (EDS), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) analyses. Ferromagnetism in Ti1âxVxO2 is revealed to be highly dependent on the V content and defect concentrations. Furthermore, the annealing study in various atmospheres indicates that the oxygen vacancies and interstitials play a crucial role in inducing ferromagnetism in Ti1âxVxO2 system, and the origin of RTFM can be explained by bound magnetic polaron model.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Xujie Lü, Jiangtian Li, Xinliang Mou, Jianjun Wu, Shangjun Ding, Fuqiang Huang, Yaoming Wang, Fangfang Xu,