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Photoluminescence studies on structural defects and room temperature ferromagnetism in Ni and Ni–H doped ZnO nanoparticles
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10.1063/1.3460644
/content/aip/journal/jap/108/2/10.1063/1.3460644
http://aip.metastore.ingenta.com/content/aip/journal/jap/108/2/10.1063/1.3460644
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Figures

Image of FIG. 1.
FIG. 1.

XRD patterns of [(a) and (b)] as-synthesized ( to 0.2) and (c) post -annealed ( to 0.2) samples. (d) The Ni content dependence of a-axis and c-axis lattice constants for as-prepared (solid points) and -annealed (open points) samples, respectively. The dashed lines show the value of the a-axis and c-axis lattice constants, respectively, in bulk ZnO. The solid line connecting the points is a visual guide.

Image of FIG. 2.
FIG. 2.

XPS patterns of (a) , (b) , (c) , and (d) nanocrystals measured at RT.

Image of FIG. 3.
FIG. 3.

(a) Magnetic hysteresis loops of the as-synthesized ( to 0.2) samples measured at RT. The inset shows the Ni concentration dependence of saturation magnetization . The solid points denote the per ion in the total samples including single-phase of ZnO:Ni and NiO, while the open points indicate the per ion only in single-phase ZnO:Ni, assuming that the maximum of the solid solubility of Ni in ZnO is 5 at. % Ni. The line connecting the points is a visual guide.

Image of FIG. 4.
FIG. 4.

Magnetic hysteresis loops of as-synthesized (solid point) and post -annealed (open point) samples with (a) , (b) , respectively.

Image of FIG. 5.
FIG. 5.

RT PL spectra of the as-prepared (, 0.01, and 0.05) samples. The inset shows the blueshift in the NBE emission.

Image of FIG. 6.
FIG. 6.

(a) RT DR spectra and (b) the vs wavelength plots of as-prepared (, 0.01, and 0.05) samples. The inset shows the blueshift in the absorption edge.

Image of FIG. 7.
FIG. 7.

(a) PL spectra and (b) DR spectra of as-synthesized (solid data) and -annealed (open data) samples.

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/content/aip/journal/jap/108/2/10.1063/1.3460644
2010-07-20
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Photoluminescence studies on structural defects and room temperature ferromagnetism in Ni and Ni–H doped ZnO nanoparticles
http://aip.metastore.ingenta.com/content/aip/journal/jap/108/2/10.1063/1.3460644
10.1063/1.3460644
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