Abstract
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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Acknowledgements
This study was partially supported by the National Natural Science Foundation of China (grant nos. 50831002, 50971025, and 51071022), the National Basic Research Program of China (grant no. 2007CB936202), the Key Grant Project of Chinese Ministry of Education (no. 309006), Beijing Municipal Natural Science Foundation (grant no. 2102032), and the Fundamental Research Funds for the Central Universities.
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Yang, H., Xu, X., Wu, S. et al. Effects of dopants on magnetic properties of Cu-doped ZnO thin films. J Mater Sci 47, 530–533 (2012). https://doi.org/10.1007/s10853-011-5830-z
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DOI: https://doi.org/10.1007/s10853-011-5830-z