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Communication Dans Un Congrès Année : 2007

Elaboration and characterization of ZnO transition metal (Co, Mn, Ni, Fe) doped aerogel nanoparticles

Lassaad El Mir
  • Fonction : Auteur
Aroussi Ben Mahmoud
  • Fonction : Auteur
Jean-Louis Cantin

Résumé

Nanocrystalline transition metal (TM=Co, Mn, Ni, Fe) doped zinc oxide powders have been elaborated by a new protocol based on slow hydrolyse of zinc acetate dissolved in methanol and supercritical drying in ethyl alcohol. The powders have a narrow size distribution with an average value of similar to 25nm. Electron microscopy characterization showed that the size of the ZnO:TM particles did not change significantly for the different dopants. High doping levels of up to [TMI] =0.25 have been investigated. X-ray diffraction studies showed the formation of the ZnO wurtzite phase for all dopants but secondary phases are equally detected. High temperature ferromagnetism was observed for Ni and Co doped powders whereas Mn doped powders showed only antiferromagnetic interactions. EPR spectroscopy indicates that the magnetism is related to the presence of extrinsic phases.
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Dates et versions

hal-01290163 , version 1 (17-03-2016)

Identifiants

  • HAL Id : hal-01290163 , version 1

Citer

Lassaad El Mir, Aroussi Ben Mahmoud, Jurgen von Bardeleben, Jean-Louis Cantin. Elaboration and characterization of ZnO transition metal (Co, Mn, Ni, Fe) doped aerogel nanoparticles. Symposium on Zinc Oxide and Related Materials held at the 2006 MRS Fall Meeting, Nov 2006, Boston, MA, Unknown Region. pp.333-338. ⟨hal-01290163⟩
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