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Erschienen in: Journal of Materials Science: Materials in Electronics 17/2018

05.07.2018

Room temperature ferromagnetism in Ni, Fe and Ag co-doped Cu–ZnO nanoparticles: an experimental and first-principles DFT study

verfasst von: O. M. Lemine, A. Modwi, A. Houas, J. H. Dai, Y. Song, M. Alshammari, A. Alanzi, R. Alhathlool, M. Bououdina

Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 17/2018

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Abstract

We report an experimental and theoretical investigation on the room temperature ferromagnetism of Zn0.95Cu0.05O and Zn0.94Cu0.05M0.01O (M=Ni, Fe and Ag)Ni nanoparticles synthesized by sol–gel method. X-ray diffraction analysis reveals single hexagonal wurtzite; meanwhile the lattice parameters are found to be sensitive to the ionic radius of the doping elements and the crystallite size varies in the range 22–47 nm. Field emission scanning electron microscopy observations show particles with spherical shape for ZnO and semi-spherical shape for co-doped nanopowders. Magnetic measurements using SQUID reveal room temperature ferromagnetic ordering for doped and co-doped nanopowders with a lower saturation magnetization compared to Cu-doped ZnO. It is found that the co-doping has resulted in weakening the ferromagnetic phase at the expense of the paramagnetic. First-principles calculations indicate that only Cu and Fe codoped ZnO systems own ferromagnetism, which originated from the interaction between Fe-d and O-p electrons. However, all doped systems show positive formation energies indicating they are less stable than undoped ZnO.

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Metadaten
Titel
Room temperature ferromagnetism in Ni, Fe and Ag co-doped Cu–ZnO nanoparticles: an experimental and first-principles DFT study
verfasst von
O. M. Lemine
A. Modwi
A. Houas
J. H. Dai
Y. Song
M. Alshammari
A. Alanzi
R. Alhathlool
M. Bououdina
Publikationsdatum
05.07.2018
Verlag
Springer US
Erschienen in
Journal of Materials Science: Materials in Electronics / Ausgabe 17/2018
Print ISSN: 0957-4522
Elektronische ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-018-9571-5

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