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Defect mediated reversible ferromagnetism in Co and Mn doped zinc oxide epitaxial films
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10.1063/1.4768721
/content/aip/journal/jap/112/11/10.1063/1.4768721
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/11/10.1063/1.4768721
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

XRD (θ-2θ) scans of the undoped ZnO and Zn0.7TM0.3O (TM = Co and Mn) films grown at substrate temperature of 550 °C and oxygen partial pressure of 10−5 Torr.

Image of FIG. 2.
FIG. 2.

XRD plots of thermal annealed and laser irradiated Zn0.95Co0.05O (a) and Zn0.95Mn0.05O (b) films.

Image of FIG. 3.
FIG. 3.

UV–Vis transmission spectra of Co doped ZnO films.

Image of FIG. 4.
FIG. 4.

UV–Vis transmission spectra of Mn doped ZnO films.

Image of FIG. 5.
FIG. 5.

Plots of (αhν)2 versus hν for the Co doped ZnO films. Straight line fits through the linear regions of the plot are extrapolated to hν = 0 to find the bandgap.

Image of FIG. 6.
FIG. 6.

Plots of (αhν)2 versus hν for the Mn doped ZnO films.

Image of FIG. 7.
FIG. 7.

Plot of the bandgap values as a function of dopant concentration.

Image of FIG. 8.
FIG. 8.

Room temperature hysteresis loops of Zn0.95Co0.05O films grown at different conditions.

Image of FIG. 9.
FIG. 9.

Room temperature hysteresis loops of oxygen annealed, oxygen annealed followed by vacuum annealed and oxygen annealed followed by laser irradiated Zn0.95Co0.05O films.

Image of FIG. 10.
FIG. 10.

Room temperature hysteresis loops of oxygen annealed, oxygen annealed followed by vacuum annealed and oxygen annealed followed by laser irradiated Zn0.95Co0.05O films.

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/content/aip/journal/jap/112/11/10.1063/1.4768721
2012-12-12
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Defect mediated reversible ferromagnetism in Co and Mn doped zinc oxide epitaxial films
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/11/10.1063/1.4768721
10.1063/1.4768721
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