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Role of point defects in room-temperature ferromagnetism of Cr-doped ZnO
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10.1063/1.2772176
/content/aip/journal/apl/91/7/10.1063/1.2772176
http://aip.metastore.ingenta.com/content/aip/journal/apl/91/7/10.1063/1.2772176
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Figures

Image of FIG. 1.
FIG. 1.

(Color online) XRD patterns (log-scale) of both Cr-doped ZnO (a) films and (b) powders; and the lattice volume of (c) films and (d) powders. Also shown in (b) is the standard diffraction pattern of wurtzite hexagonal ZnO (powder diffraction file number 79-2205). “” represents the peaks of the impurity phase of .

Image of FIG. 2.
FIG. 2.

(Color online) (a) Hysteresis loops of film measured at 5 and ; (b) magnetization of samples at ; (c) ZFC/FC curves for film measured at ; and (d) magnetization curves as functions of the magnetic field for powders at .

Image of FIG. 3.
FIG. 3.

(Color online) Magnetization curves of film before and after annealing in vacuum and air measured at . The bottom inset is the magnetization of Cr atom with different x at different annealing temperatures in air.

Image of FIG. 4.
FIG. 4.

(Color online) Fitting and experimental data for RT PL spectra of films: (a) as deposited, (b) annealing at 200 and (c) in air, and annealing at in vacuum for . The dashed lines are Gaussian fitting of , , , , and , respectively.

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/content/aip/journal/apl/91/7/10.1063/1.2772176
2007-08-17
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Role of point defects in room-temperature ferromagnetism of Cr-doped ZnO
http://aip.metastore.ingenta.com/content/aip/journal/apl/91/7/10.1063/1.2772176
10.1063/1.2772176
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