Ferromagnetism of Mn-doped ZnO nanoparticles prepared by sol-gel process at room temperature
Gui-jun Huang , Jin-bin Wang , Xiang-li Zhong , Gong-cheng Zhou , Hai-long Yan
Optoelectronics Letters ›› 2006, Vol. 2 ›› Issue (6) : 439 -442.
Ferromagnetism of Mn-doped ZnO nanoparticles prepared by sol-gel process at room temperature
Mn-doped ZnO diluted magnetic semiconductor nanoparticles are prepared by an ultrasonic assisted solgel process. Transmission electron microscopy shows pseudo-hexagonal nanoparticles with an average size of about 24 nm. From the analysis of X-ray diffraction, the Mn-doped ZnO nanoparticles are identified to be a wurtzite structure without any impurity phases. The magnetic properties are measured by using superconducting quantum interference device. For the ZnO with 2% Mn doping concentration, a good hysteresis loop indicates fine ferromagnetism with a Curie temperature higher than 350 K.
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