Magnetic Properties, Electron Paramagnetic Resonance, and Photoelectron Spectroscopy Studies of Nanocrystalline TiO2 Co-Doped with Al and Fe
| Autor: | Yermakov, A. Y., Galakhov, V. R., Minin, A. S., Mesilov, V. V., Uimin, M. A., Kuepper, K., Bartkowski, S., Molochnikov, L. S., Konev, A. S., Gaviko, V. S., Zakharova, G. S. |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Condensed Matter::Materials Science
ELECTRON PARAMAGNETIC RESONANCE Condensed Matter::Superconductivity TITANIUM DIOXIDE Physics::Atomic and Molecular Clusters NANOPARTICLES Physics::Optics PHOTOELECTRON SPECTROSCOPY Condensed Matter::Strongly Correlated Electrons ALUMINUM DOPING TRANSMISSION ELECTRON MICROSCOPY |
| Zdroj: | Physica Status Solidi (B): Basic Research |
| Popis: | Electron paramagnetic resonance, X-ray photoelectron spectroscopy, field dependence of magnetization, X-ray diffraction, and transmission electron microscopy are applied for the characterization of Al-doped TiO2 nanopowders with Fe impurities synthesized by the autoclave-assisted hydrothermal method and annealed in vacuum or in hydrogen. The sizes of the TiO2:(Al, Fe) nanoparticles are estimated to be about 10-20 nm. It is proposed that Al ions are presumably placed in the TiO2 lattice in interstitial positions. Moreover, Fe3+ ions can occupy tetrahedral positions of Ti4+ ions as a result of Al-doping. The results suggest that Al-doped TiO2 nanopowders with Fe impurities annealed in vacuum or hydrogen display both intrinsic and extrinsic ferromagnetic properties. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|