Journal
JOURNAL OF MATERIALS SCIENCE
Volume 47, Issue 1, Pages 530-533Publisher
SPRINGER
DOI: 10.1007/s10853-011-5830-z
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Funding
- National Natural Science Foundation of China [50831002, 50971025, 51071022]
- National Basic Research Program of China [2007CB936202]
- Chinese Ministry of Education [309006]
- Beijing Municipal Natural Science Foundation [2102032]
- Fundamental Research Funds for the Central Universities
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We report the observation of room temperature ferromagnetism (FM) in Cu-doped ZnO (ZnO: Cu) thin films synthesized by sol-gel technique. While donor Al3+ cations are introduced into the ZnO: Cu films, the saturation magnetization decreases rapidly. Cu 2p core-level X-ray photoelectronic spectra demonstrate that the FM is strongly correlated with Cu2+ cations (3d (9) configuration). To further study the relationship between the FM and acceptors, Na+ cations are also introduced into the ZnO: Cu films to increase the saturation magnetization. The enhanced FM in the (Cu, Na)-codoped ZnO is suggested to be due to the hybridization between delocalized holes and spin-split Cu 3d states.
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