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d 0 ferromagnetism in undoped sphalerite ZnS nanoparticles
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) (a) The XRD patterns of samples S1-S5. (b) The representative TEM image of sample S1. Inset: The corresponding EDS result. The HRTEM image (c) and the SAED pattern (d) of sample S1.

Image of FIG. 2.
FIG. 2.

(Color online) (a) The M − H curves of ZnS NPs. The notations are used as same as Fig. 1. Inset: the ZFC and FC curves with a dc field of 100 Oe applied on sample S1. (b) The M-H curves measured at different temperatures of sample S1. Inset: The magnified view of the low-field date. (c) The ESR spectrums. (d) The calculated resonance filed and effective g-factor for samples S1-S5.

Image of FIG. 3.
FIG. 3.

(a) XPS survey spectrum, high resolution scan of S 2p (b) and Zn 2p (c) of sample S1.

Image of FIG. 4.
FIG. 4.

(Color online) (a) The integrated PL intensity of blue emission and Ms for ZnS NPs versus their corresponding levels of sulfur vacancies δ obtained from XPS results. Inset: The PL results of the samples. (b) The dependence of Ms for sample S1 post-annealed with different hydrogen and argon ratio.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: d0 ferromagnetism in undoped sphalerite ZnS nanoparticles