Room-temperature ferromagnetism of the amorphous Cu-doped ZnO thin films

Amorphous copper-doped ZnO thin films (ZnO:Cu) prepared on glass substrates by the radio-frequency magnetron co-sputtering have been investigated. Magnetic measurements indicated that the amorphous ZnO:Cu thin films were ferromagnetic at room temperature and the saturation magnetization was much hig...

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Veröffentlicht in:Applied surface science 2010-02, Vol.256 (8), p.2507-2508
Hauptverfasser: Qi, Jing, Gao, Daqiang, Zhang, Li, Yang, Yinghu
Format: Artikel
Sprache:eng
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Zusammenfassung:Amorphous copper-doped ZnO thin films (ZnO:Cu) prepared on glass substrates by the radio-frequency magnetron co-sputtering have been investigated. Magnetic measurements indicated that the amorphous ZnO:Cu thin films were ferromagnetic at room temperature and the saturation magnetization was much higher than that of the polycrystalline films. X-ray diffraction results showed there was no Cu 2O phase in amorphous ZnO:Cu films, which might be the reason for the high magnetic moment of the films. On the other hand, the high saturation magnetization of the amorphous ZnO:Cu films could also attribute to that there was no limit of solid solubility of Cu in amorphous ZnO solvent. The X-ray photoelectron spectroscopy study of the amorphous ZnO:Cu thin films reveal that copper was in Cu 2+ chemical state.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2009.10.096