Cr 掺杂ZnS纳米颗粒的铁磁性能

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Abstract

Cr-doped ZnS semiconductor nanoparticles of magnetic property was successfully prepared via a solvothermal reaction of ZnO and S with CrCl₃·6H₂O in mixed solvents of ethylenediamine and ethanolamine at 190 ℃. X-ray diffraction (XRD) measurement demonstrated that the undoped and Cr-doped nanoparticles had a hexagonal structure. Transmission electron microscopy (TEM) images revealed that the morphologies of ZnS with different amounts of chromium consisted of nanoparticles. The average particle size of Zn_1-_xCr_xS (x = 0.052 7) nanoparticles was in the range of 30-40 nm. This product, composed of Cr, Zn, and S, was observed by an energy dispersive spectrometer (EDS). The photoluminescence (PL) spectra of Cr doped ZnS nanoparticles showed that the absorption edge was slightly shifted towards the short wavelength compared with undoped ZnS. A vibrating sample magnetometer (VSM) showed that the Cr-doped ZnS nanoparticles exhibited increased ferromagnetism at room temperature, while the pure ZnS nanoparticles exhibited diamagnetism. The saturation magnetization of the Zn_1-_xCr_xS (x = 0.052 7) nanoparticles was 4.275 A/m. The experimental results confirmed that Cr-doped ZnS nanosheets exhibited ferromagnetism at room temperature, in good agreement with the ferromagnetic properties of Cr-doped ZnS that were predicted by first-principle computations. The origin of the ferromagnetism in the Zn_1-_xCr_xS nanoparticles is intrinsic to the DMS.

Key words： Zinc Sulfide (ZnS) Chromium (Cr) nanoparticles ferromagnetism solvothermal

Received: 01 September 2016 Published: 10 July 2017

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	Articles by authors
	Zhufeng ZHANG
	Yinshuan REN
	Lu HAN
	Guoya XIE
	Bo ZHONG

Cite this article:

Zhufeng ZHANG,Yinshuan REN,Lu HAN, et al. Ferromagnetic Properties of Cr-doped with ZnS Nanoparticles[J]. Research and Exploration in Laboratory, 2017, 36(5): 36-39.

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http://www.qk.sjtu.edu.cn/rel/EN/ OR http://www.qk.sjtu.edu.cn/rel/EN/Y2017/V36/I5/36

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