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Study of electronic structure and magnetization correlations in hydrogenated and vacuum annealed Ni doped ZnO
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10.1063/1.3556458
/content/aip/journal/jap/109/6/10.1063/1.3556458
http://aip.metastore.ingenta.com/content/aip/journal/jap/109/6/10.1063/1.3556458

Figures

Image of FIG. 1.
FIG. 1.

(Color online) The fitted and indexed XRD pattern of Zn0.95Ni0.05O and Zn0.95Ni0.05O:H at 300 K. Observed (calculated) profiles are shown by open circles (solid curves). The short vertical marks represent Bragg reflections. The lower curve is the difference plot.

Image of FIG. 2.
FIG. 2.

(Color online) The M-H curves at 300 K for (a) pure ZnO and the as-synthesized Zn0.95Ni0.05O, (b) the hydrogenated Zn0.95Ni0.05O, (c) both the reheated samples Zn0.95Ni0.05O:H:Ht and Zn0.95Ni0.05O:Vc:Ht, and (d) the vacuum annealed Zn0.95Ni0.05O:Vc.

Image of FIG. 3.
FIG. 3.

(Color online) The Zn 2p 3/2 , 2p 1/2 XPS spectra for ZnO, as-prepared Zn0.95Ni0.05O, the hydrogenated Zn0.95Ni0.05O:H, and the vacuum annealed Zn0.95Ni0.05O:Vc.

Image of FIG. 4.
FIG. 4.

(Color online) The Ni 2p 3/2 , 2p 1/2 XPS spectrum for the as-prepared Zn0.95Ni0.05O along with the Gaussian fits. The inset compares a magnified view of Ni 2p 3/2 peaks for Zn0.95Ni0.05O, Zn0.95Ni0.05O:H, and Zn0.95Ni0.05O:Vc.

Image of FIG. 5.
FIG. 5.

(Color online) The O 1s XPS spectra for the as-prepared Zn0.95Ni0.05O along with the Gaussian fits. The inset compares the O 1s bulk Gaussian peak for the as-prepared Zn0.95Ni0.05O, the hydrogenated Zn0.95Ni0.05O:H, the evacuated Zn0.95Ni0.05O:Vc, and the reheated Zn0.95Ni0.05O:H:Ht

Image of FIG. 6.
FIG. 6.

(Color online) The saturation magnetization (MS ) at field H = 1 T, the oxygen vacancies and the resistance for Zn0.95Ni0.05O after different annealing stages. The stages 1, 2, 3, 4, and 5 stand for the samples obtained after the treatments: Just as-synthesized, annealed in H2, reheated in air, annealed in vacuum, and finally annealed in air.

Tables

Generic image for table
Table I.

The refined lattice and structural parameters for pure Zn0.95Ni0.05O, the hydrogenated Zn0.95Ni0.05O:H, the vacuum annealed Zn0.95Ni0.05O:Vc, and air reheated Zn0.95Ni0.05O:H:Ht. Space group: P63 mc (No. 186, Z = 2).

Generic image for table
Table II.

The saturation magnetic moments (Ms ), coercivity estimated from M-H curves, the resistance values for pure Zn0.95Ni0.05O, hydrogenated Zn0.95Ni0.05O:H, and vacuum annealed Zn0.95Ni0.05O:Vc, and the reheated samples Zn0.95Ni0.05O:H:Ht and Zn0.95Ni0.05O:Vc:Ht. The relative oxygen bulk contents estimated from the O 1s XPS data are also shown.

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/content/aip/journal/jap/109/6/10.1063/1.3556458
2011-03-17
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Study of electronic structure and magnetization correlations in hydrogenated and vacuum annealed Ni doped ZnO
http://aip.metastore.ingenta.com/content/aip/journal/jap/109/6/10.1063/1.3556458
10.1063/1.3556458
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