TY - JOUR
T1 - Magnetic and optical properties of manganese doped ZnO nanoparticles synthesized by sol-gel technique
AU - Omri, Karim
AU - El Ghoul, Jaber
AU - Lemine, O. M.
AU - Bououdina, M.
AU - Zhang, Bei
AU - El Mir, Lassaad
N1 - KAUST Repository Item: Exported on 2020-10-01
PY - 2013/8
Y1 - 2013/8
N2 - 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.
AB - 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.
UR - http://hdl.handle.net/10754/562878
UR - https://linkinghub.elsevier.com/retrieve/pii/S0749603613001237
UR - http://www.scopus.com/inward/record.url?scp=84878375779&partnerID=8YFLogxK
U2 - 10.1016/j.spmi.2013.04.029
DO - 10.1016/j.spmi.2013.04.029
M3 - Article
SN - 0749-6036
VL - 60
SP - 139
EP - 147
JO - Superlattices and Microstructures
JF - Superlattices and Microstructures
ER -