Structural and Magnetic Property of Ion Irradiated TiO2 Single Crystals
- Received Date: 2011-07-01
Abstract: Ferromagnetism is induced in pure TiO2 single crystals by oxygen ion irradiation. The ferro-magnetism is observed up to room temperature and is with weak temperature dependence. By combining X-ray diffraction, Rutherford backscattering/channelling, Raman scattering, and electron-spin resonance spectroscopy, supperconducting quantum interference device, displacement per atom, we measured the lattice damage accumulation with increasing flu-ences. A defect complex, i.e., Ti3+ on the substitutional accompanied by oxygen vacancies, has been identified in the irradiated TiO2. This kind of defect complex results in a local (TiO6-x) stretching Raman mode. We elucidate that Ti3+ with one unpaired 3d electron provide the local magnetic moments.
|Citation:||Bin-feng Ding, Feng-hua Xiang. Structural and Magnetic Property of Ion Irradiated TiO2 Single Crystals[J]. Chinese Journal of Chemical Physics , 2012, 25(1): 19-24. doi: 10.1088/1674-0068/25/01/19-24|