Electronic and magnetic properties of V-doped anatasefrom first principles
- 11 December 2006
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 74 (23), 233201
- https://doi.org/10.1103/physrevb.74.233201
Abstract
We report a first-principles study on the geometric, electronic, and magnetic properties of V-doped anatase . The (Hubbard coefficient) approach predicts semiconductor band structures for ( and 12.5%), in good agreement with the poor conductivity of samples, while the standard calculation within generalized gradient approximation fails. Theoretical results show that V atoms tend to stay close and result in strong ferromagnetism through superexchange interactions. Oxygen vacancy induced magnetic polaron could produce long-range ferromagnetic interaction between largely separated magnetic impurities. The experimentally observed ferromagnetism in V-doped anatase at room temperature may originate from a combination of short-range superexchange coupling and long-range bound magnetic polaron percolation.
Keywords
This publication has 20 references indexed in Scilit:
- Signature of Carrier-Induced Ferromagnetism in : Exchange Interaction between High-Spin and the Ti Conduction BandPhysical Review Letters, 2006
- Understanding ferromagnetism in Co-dopedanatase from first principlesPhysical Review B, 2006
- Transition metal-doped TiO2and ZnO—present status of the fieldJournal of Physics: Condensed Matter, 2005
- Evolution of ferromagnetic circular dichroism coincident with magnetization and anomalous Hall effect in Co-doped rutile TiO2Applied Physics Letters, 2005
- Electric Field Effect in Diluted Magnetic Insulator AnatasePhysical Review Letters, 2005
- Effects of high-temperature postannealing on magnetic properties of Co-doped anatasethin filmsPhysical Review B, 2005
- Electronic structure and optical properties of the Co-doped anatasestudied from first principlesPhysical Review B, 2004
- Investigation of the cobalt distribution in the room temperature ferromagnet TiO2:CoJournal of Applied Physics, 2003
- Distribution and magnetization of Co impurities in anatasePhysical Review B, 2003
- Room-Temperature Ferromagnetism in Transparent Transition Metal-Doped Titanium DioxideScience, 2001