New insights into structural and magnetic properties of Ce doped ZnO nanoparticles

Cerium doped ZnO nanoparticles were successfully prepared by the co-precipitation method using cerium sulphate as dopant precursor. The effect of cerium doping on the structural, morphological and optical properties of the obtained nanoparticles were investigated. X-ray diffraction and EDX analyses...

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Bibliographic Details
Published in:Journal of alloys and compounds 2018-08, Vol.757, p.60-69
Main Authors: Fifere, Nicusor, Airinei, Anton, Timpu, Daniel, Rotaru, Aurelian, Sacarescu, Liviu, Ursu, Laura
Format: Article
Language:English
Subjects:
Absorption spectra
Ce doped ZnO
Cerium
Doping
Emission
Energy gap
Ferromagnetism
Gap energy
Lattice vacancies
Luminescence
Magnetic properties
Magnetism
Nanoparticles
Optical properties
Photoluminescence
Reflectance
Room temperature ferromagnetism
Surface defects
Temperature
Wurtzite
X-ray diffraction
Zinc oxide
Zinc oxides
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Summary:Cerium doped ZnO nanoparticles were successfully prepared by the co-precipitation method using cerium sulphate as dopant precursor. The effect of cerium doping on the structural, morphological and optical properties of the obtained nanoparticles were investigated. X-ray diffraction and EDX analyses indicated that the cerium doped ZnO nanoparticles retained the hexagonal wurtzite structure of ZnO and the cerium ions were incorporated into the ZnO lattice. TEM images showed the average diameter of cerium doped ZnO nanoparticles (30–60 nm). The absorption spectra were determined from the reflectance spectra using the Kubelka-Munk theory and the band gap energy was found to decrease as the Ce doping level increased. Ce doped ZnO nanoparticles exhibited an intense UV emission at about 380 nm, and a blue emission at 400–500 nm due to surface defects. Room temperature ferromagnetism was found in these samples associated with Ce3+ ion doping and oxygen vacancies. [Display omitted] •Cerium doped ZnO nanoparticles have been obtained by coprecipitation method.•The presence of some intrinsic defects in doped samples was confirmed by Raman and emission spectra.•Increasing cerium doping level can induce high values of the Urbach tail.•Room temperature ferromagnetic order was found in cerium doped ZnO nanoparticles.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2018.05.031