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Effect of annealing temperature on the magnetic properties of Zn 0.97 Al 0.03 O nanoparticles
Author(s) -
Gao Hua,
Gao Daqiang,
Yang Guijin,
Zhang Jing,
Zhang Jinlin,
Shi Zhenhua,
Xue Desheng
Publication year - 2011
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201127109
Subject(s) - annealing (glass) , materials science , x ray photoelectron spectroscopy , ferromagnetism , nanoparticle , impurity , analytical chemistry (journal) , diffraction , electron paramagnetic resonance , inductively coupled plasma , magnetization , paramagnetism , magnetic nanoparticles , condensed matter physics , nuclear magnetic resonance , nanotechnology , chemistry , plasma , metallurgy , magnetic field , optics , physics , organic chemistry , chromatography , quantum mechanics
Al doped ZnO nanoparticles were synthesized by the sol‐gel technique. X‐ray diffraction, selected area electron diffraction, inductively coupled plasma‐atomic emission and X‐ray photoelectron spectroscopy results ruled out impurity and other phases in Zn 0.97 Al 0.03 O nanoparticles annealing at different temperatures. Magnetic measurements indicate that all the samples have the obvious room temperature ferromagnetism. With the increase of annealing temperatures from 500 to 900 °C, the saturation magnetization of nanoparticles decreases with the reduction of defect‐related emission. Together with the electron paramagnetic resonance results, the observed ferromagnetic ordering of Zn 0.97 Al 0.03 O nanoparticles annealing at different temperatures is consider to be related to the singly charged oxygen vacancies.