Back to Search
Start Over
Room Temperature Ferromagnetism in Lithium-Doped ZnO.
- Source :
-
IEEE Transactions on Magnetics . Nov2012, Vol. 48 Issue 11, p3422-3425. 4p. - Publication Year :
- 2012
-
Abstract
- Here we report our study on the lithium-doped ZnO films prepared by sol-gel method. The films are polycrystalline wurtzite structure and the average particle size is about 50 nm. All the films are ferromagnetic, and the film with Li content of 8 at. % has the largest saturation magnetization of about 55 memu/g. The photoluminescence spectra show that the films have weak emission near ultraviolet region and strong emission in visible regions. The Li atoms in Zn sites can induce Zn vacancies and a low acceptor level in the energy gap, which are required for ferromagnetism. The first-principles calculations demonstrate that the ferromagnetism in the Li-doped ZnO originates from the induced magnetic moment of oxygen atoms in the nearest neighbor sites to Li-Zn vacancy pair. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00189464
- Volume :
- 48
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Magnetics
- Publication Type :
- Academic Journal
- Accession number :
- 82708528
- Full Text :
- https://doi.org/10.1109/TMAG.2012.2196415