Magnetic and optical properties of manganese doped ZnO nanoparticles synthesized by sol-gel technique

Karim Omri, Jaber El Ghoul, O. M. Lemine, M. Bououdina, Bei Zhang, Lassaad El Mir

Research output: Contribution to journalArticlepeer-review

90 Scopus citations

Abstract

Mn doped ZnO nanoparticles with different doping concentration (1, 2, 3, 4, 5 at.%) were prepared by sol-gel method using supercritical drying conditions of ethyl alcohol. The structural, morphological, optical and magnetic properties of the as-prepared nanoparticles were investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), UV measurements and superconducting quantum interference device (SQUID). The structural properties showed that the undoped and Mn doped ZnO nanoparticles exhibit hexagonal wurtzite structure. From the optical studies, the transmittance in UV region was decreased with the increase of Mn concentration. For Mn doped ZnO nanoparticles the optical band gap varies between 3.34 eV and 3.22 eV. It was found that the doping Mn 2+ ions have a significant influence on the optical properties. The magnetic characterization of the samples with 1% and 5% Mn concentrations reveal diamagnetic behavior for the first one and the presence of both paramagnetic and ferromagnetic behavior for the second. The room ferromagnetic component is due to the presence of the secondary phase ZnOMn3 which is confirmed by XRD study. © 2013 Elsevier Ltd. All rights reserved.
Original languageEnglish (US)
Pages (from-to)139-147
Number of pages9
JournalSuperlattices and Microstructures
Volume60
DOIs
StatePublished - Aug 2013

ASJC Scopus subject areas

  • Materials Science(all)
  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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