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|Type:||Artigo de periódico|
|Title:||Optical And Magnetic Properties Of Zn0.9-xco0.1o : Alx Thin Films|
|Abstract:||The high-Tc ferromagnetic property in Co-doped ZnO (ZCO), mediated by donor impurity band was tested by controlled introduction of shallow donors (Al) in the Zn0.9-xCo0.1O:Alx (x=0.005 and 0.01) thin films. The saturation magnetization for the 10% Co-doped ZnO (4 emu/cc) at 300 K reduces (∼0.8 emu/cc) due to Al doping. The resistivity drops abruptly, from ∼ 103 Ω - cm for the ZCO film to 0.033 and 0.02 Ω cm for the 0.5% and 1.0% Al doped ZCO samples, respectively. The XPS measurements did not show any signature of metallic Co clusters formation in these samples. © 2008 Elsevier Ltd. All rights reserved.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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