Synthesis of high-TC ferromagnetic Mn-doped ZnO nanorods by thermal evaporation |
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Authors: | Zheng Kai-Hong Liu Zheng Liu Ji Hu Li-Jun Wang Dong-Wei Chen Chun-Ying and Sun Lian-Feng |
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Institution: | National Center for Nanoscience and Technology, Beijing 100190, China; National Center for Nanoscience and Technology, Beijing 100190, China;Graduate School of the Chinese Academy of Sciences, Beijing 100049, China |
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Abstract: | This paper reports that a large amount of Mn-doped ZnO
nanorods have been synthesized through thermal evaporation. The
morphologies and properties are studied with x-ray diffraction,
a scanning electron microscope, transmission electron microscope and
Raman spectroscope. The results indicate that the manganese atoms
occupy the zinc vacancies in the wurtzite lattice of ZnO without
forming secondary phases. The exact manganese content has been
studied by the x-ray fluorescence spectrum. Meanwhile, the magnetic moment
versus temperature result proves that the as-prepared Mn-doped ZnO
nanorods show ferromagnetic properties at temperatures as high as
400~K. These studies provide a good understanding of the origin of
magnetic properties in diluted magnetic semiconductors. |
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Keywords: | nanorod ferromagnetism Mn-doped ZnO |
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