| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1614825 | Journal of Alloys and Compounds | 2013 | 5 Pages |
The paper deals with the influence of Co doping on the structural, optical and magnetic properties of TiO2. XRD and Raman measurements confirmed single phase anatase structure of the Co doped TiO2 without having any impurity phases. The results are explained in terms of the broadening of peaks and small shift of Raman scattering modes, which is caused by the generation of defects such as vacancies and interstitials and owe their presence due to the microscopic structural disorder of oxygen lattice. 10% Co doped TiO2 exhibits room temperature ferromagnetic behavior with a 0.937 emu/g saturation magnetization and 65 Oe coercivity. Optical spectra have red shift with increasing Co in TiO2, due to sp–d exchange interactions. These interactions may be responsible for the ferromagnetic properties of the samples and the carriers are spin-polarized to mediate the ferromagnetic ordering.
► Co doping on the structural, optical and magnetic properties of TiO2. ► Generation of defects such as vacancies and interstitials. ► Their presence due to the microscopic structural disorder of oxygen lattice. ► Red shift in absorption spectra with increasing Co, due to sp–d interactions. ► FM arise from the intrinsic exchange interaction of magnetic moments.
