Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1673475 | Thin Solid Films | 2008 | 4 Pages |
Abstract
We report here the observation of significant room-temperature ferromagnetism in a semiconductor doped with nonmagnetic impurities, Cu-doped TiO2 thin films grown by reactive magnetron sputtering. Films annealed in air were not magnetic while those annealed in vacuum were ferromagnetic with a Curie temperature about 350 K. The magnetic moment per copper atom decreased as the copper concentration increased. These results show that both the oxygen vacancies and the distance between nearest-neighbor copper atoms play a crucial role for the appearance of magnetism.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Deng Lu Hou, Rui Bin Zhao, Hai Juan Meng, Li Yun Jia, Xiao Juan Ye, Hong Juan Zhou, Xiu Ling Li,