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.
XPS patterns of (a) , (b) , (c) , and (d) nanocrystals measured at RT.
(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.
Magnetic hysteresis loops of as-synthesized (solid point) and post -annealed (open point) samples with (a) , (b) , respectively.
RT PL spectra of the as-prepared (, 0.01, and 0.05) samples. The inset shows the blueshift in the NBE emission.
(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.
(a) PL spectra and (b) DR spectra of as-synthesized (solid data) and -annealed (open data) samples.
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