We report on the origin of ferromagnetism in ZnO and Co-doped ZnO magnetic semiconductor films prepared by sol-gel technique on Si(100) and SiO2 substrates. X-ray diffraction measurements have shown that ZnO and Co-doped ZnO have the expected wurtzite structure and a preferential orientation along the c axis. Optical transmittance measurements revealed that Co is incorporated into the lattice, as Co2+ substituting Zn2+ ions. Magnetization measurements have shown room-temperature ferromagnetism for both ZnO and ZnO:Co films. After annealing, the magnetization curves recorded on free substrates show the same ferromagnetic behavior as the ZnO:Co film indicating that the ferromagnetism is extrinsic and due to external pollution. (c) 2006 American Institute of Physics.
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ECPM, ULP, CNRS, UMR 7504,Grp Mat Inorgan,IPCMS,Inst Phys & Chim M, F-67037 Strasbourg, FranceECPM, ULP, CNRS, UMR 7504,Grp Mat Inorgan,IPCMS,Inst Phys & Chim M, F-67037 Strasbourg, France
Bouloudenine, M
;
Viart, N
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ECPM, ULP, CNRS, UMR 7504,Grp Mat Inorgan,IPCMS,Inst Phys & Chim M, F-67037 Strasbourg, FranceECPM, ULP, CNRS, UMR 7504,Grp Mat Inorgan,IPCMS,Inst Phys & Chim M, F-67037 Strasbourg, France
Viart, N
;
Colis, S
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ECPM, ULP, CNRS, UMR 7504,Grp Mat Inorgan,IPCMS,Inst Phys & Chim M, F-67037 Strasbourg, FranceECPM, ULP, CNRS, UMR 7504,Grp Mat Inorgan,IPCMS,Inst Phys & Chim M, F-67037 Strasbourg, France
Colis, S
;
Dinia, A
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ECPM, ULP, CNRS, UMR 7504,Grp Mat Inorgan,IPCMS,Inst Phys & Chim M, F-67037 Strasbourg, FranceECPM, ULP, CNRS, UMR 7504,Grp Mat Inorgan,IPCMS,Inst Phys & Chim M, F-67037 Strasbourg, France
机构:
ECPM, ULP, CNRS, UMR 7504,Grp Mat Inorgan,IPCMS,Inst Phys & Chim M, F-67037 Strasbourg, FranceECPM, ULP, CNRS, UMR 7504,Grp Mat Inorgan,IPCMS,Inst Phys & Chim M, F-67037 Strasbourg, France
Bouloudenine, M
;
Viart, N
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h-index: 0
机构:
ECPM, ULP, CNRS, UMR 7504,Grp Mat Inorgan,IPCMS,Inst Phys & Chim M, F-67037 Strasbourg, FranceECPM, ULP, CNRS, UMR 7504,Grp Mat Inorgan,IPCMS,Inst Phys & Chim M, F-67037 Strasbourg, France
Viart, N
;
Colis, S
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h-index: 0
机构:
ECPM, ULP, CNRS, UMR 7504,Grp Mat Inorgan,IPCMS,Inst Phys & Chim M, F-67037 Strasbourg, FranceECPM, ULP, CNRS, UMR 7504,Grp Mat Inorgan,IPCMS,Inst Phys & Chim M, F-67037 Strasbourg, France
Colis, S
;
Dinia, A
论文数: 0引用数: 0
h-index: 0
机构:
ECPM, ULP, CNRS, UMR 7504,Grp Mat Inorgan,IPCMS,Inst Phys & Chim M, F-67037 Strasbourg, FranceECPM, ULP, CNRS, UMR 7504,Grp Mat Inorgan,IPCMS,Inst Phys & Chim M, F-67037 Strasbourg, France