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- Title
Tunable Ferromagnetic Behaviors Observed in Highly Orientated Co-Doped ZnO Thin Films by the Bandgap Engineering.
- Authors
Zhang, Yujun; Guo, Ting; Luo, Yi ‐ Dong; Lin, Yuan ‐ Hua; Nan, Ce ‐ Wen; Chen, X. M.
- Abstract
Highly orientated Co-doped Zn( Mg, Cd) O thin films have been prepared on Si (001) substrate using pulsed laser deposition (PLD). Our results indicate that Mg and Cd-doping can tune the bandgap of ZnO thin film. Apparent room-temperature ferromagnetism is observed in these films, which can be modified by the bandgap of ZnO. A narrow bandgap enhances the ferromagnetism of the films through the Cd-doping, and wide bandgap does the opposite through the Mg-doping, which may be ascribed to the ferromagnetic ( FM) exchange interaction between the 3 d states of magnetic Co ions and the impurity band. These experimental results provide some new evidence that the ferromagnetism in Co: ZnO is closely related to crystal defects and improve our knowledge about ferromagnetism in dilute magnetic oxides.
- Subjects
ZINC oxide films; THIN films; FERROMAGNETIC materials; SURFACE coatings; FERROMAGNETISM; ELECTRONS
- Publication
Journal of the American Ceramic Society, 2013, Vol 96, Issue 2, p361
- ISSN
0002-7820
- Publication type
Article
- DOI
10.1111/jace.12145