Bibliographic Details
| Title: |
Room Temperature Ferromagnetism in Lithium-Doped ZnO. |
| Authors: |
Ran, C. J.1, Xu, X. G.2, Yang, H. L.3, Wang, Y. K.4, Miao, J.3, Jiang, Y.3 |
| Source: |
IEEE Transactions on Magnetics. Nov2012, Vol. 48 Issue 11, p3422-3425. 4p. |
| Subjects: |
Ferromagnetism, Lithium, Zinc oxide, Polycrystals, Photoluminescence, Sol-gel processes, Particle size distribution |
| 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] |
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| Database: |
Engineering Source |
