Abstract
Co0.2Mg x Zn0.8−x O films prepared with different molar ratio of magnesium acetate to zinc acetate were deposited on substrates by the sol–gel technique. X-ray diffraction, photoluminescence (PL) and ferromagnetism measurements were used to characterize the Co0.2Mg x Zn0.8−x O diluted magnetic semiconductors. The acceptor-like defects were determined in the PL band and the intensity of the acceptor-related PL increased with increasing Mg concentration. Therefore, an increase in the number of the acceptor-like defects (zinc vacancies especially) in the Co0.2Mg x Zn0.8−x O film may lead to the enhancement of the magnetic properties. It is worth noting that changes in Mg concentration and the number of the acceptor-like defects are important issues for producing strong ferromagnetism Co0.2Mg x Zn0.8−x O films prepared by the sol–gel method.
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The authors acknowledge the support of the National Science Council of Taiwan (Contract No. 97-2628-M-018-001-MY3) in the form of grants.
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Lin, YJ., Tsai, CL., Liu, CJ. et al. Ferromagnetism study of Co0.2Mg x Zn0.8−x O films prepared by the sol–gel method. J Sol-Gel Sci Technol 52, 109–112 (2009). https://doi.org/10.1007/s10971-009-2009-z
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DOI: https://doi.org/10.1007/s10971-009-2009-z