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Ferromagnetism in Cu-doped ZnO films: Role of charge carriers
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View: Figures


Image of FIG. 1.
FIG. 1.

X-ray diffraction (XRD) patterns for thin film. Upper inset shows the (0002) peak of along with the corresponding peak of pure ZnO. Lower inset shows the x-ray -scan from film for plane.

Image of FIG. 2.
FIG. 2.

Optical absorbance data of (a) and (b) ZnO. The inset shows the plot of energy.

Image of FIG. 3.
FIG. 3.

Magnetization field curves for film at different temperatures. The inset shows the saturation magnetization as a function of temperature.

Image of FIG. 4.
FIG. 4.

Magnetization field curves for film recorded at . Upper inset shows the magnetic susceptibility temperature variation. Lower inset shows 1/T.

Image of FIG. 5.
FIG. 5.

Schematic diagram showing Cu ions embedded in (a) film with carrier concentration of . In these films, Cu ions exist predominantly in magnetically active state, and (b) film with carrier concentration of . Because of the enhanced carrier concentration, a fraction of additional electrons gets transferred to the orbitals of Cu ions, resulting in the completely filled orbitals. In films, only about 17% of Cu ions exist in magnetically active state.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Ferromagnetism in Cu-doped ZnO films: Role of charge carriers