| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1498841 | Scripta Materialia | 2013 | 4 Pages |
Abstract
Pure ZnO and Zn0.95Co0.05O films were deposited on sapphire substrates by pulsed-laser deposition. We confirm that the magnetic behavior is intrinsic property of Co-doped ZnO nanocrystalline films. Oxygen vacancies play an important mediation role in Co–Co ferromagnetic coupling. The thermal irreversibility of field-cooling and zero field-cooling magnetizations reveals the presence of superparamagnetic behavior in our films, while no evidence of metallic Co clusters was detected. The origin of the observed superparamagnetism is discussed.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Qiang Li, Yuyin Wang, Lele Fan, Jiandang Liu, Wei Kong, Bangjiao Ye,