CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Multiferroic ZnO obtained by substituting oxygen with nitrogen |
Xu Qing-Yu(徐庆宇)a)†,Wen Zheng(温峥)b), Gao Jin-Long(高锦龙)c),Wu Di(吴迪) b), Qiu Teng(邱腾)a),Tang Shao-Long(唐少龙)c),and Xu Ming-Xiang(徐明祥)a) |
a Department of Physics, Southeast University, Nanjing 211189, China; b Department of Materials Science and Engineering, Nanjing University, Nanjing 210008, China; c Department of Physics, Nanjing University, Nanjing 210008, China |
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Abstract N-doped ZnO films were prepared in nitrogen plasma by pulsed laser deposition. Clear room temperature ferromagnetism has been observed in the film prepared at a substrate temperature of 500 °C. The structural characterizations of X-ray diffraction, Raman, and X-ray photoelectron spectroscopy confirm the substitution of O by N in ZnO, which has been considered to be the origin of the observed ferromagnetism. Furthermore, ferroelectricity has been observed at room temperature by piezoelectric force microscopy, indicating the potential multiferroic applications.
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Received: 10 February 2011
Revised: 15 March 2011
Accepted manuscript online:
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PACS:
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75.85.+t
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(Magnetoelectric effects, multiferroics)
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75.50.Pp
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(Magnetic semiconductors)
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77.55.hf
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(ZnO)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 50802041 and 50872050), the National Key
Basic Research Program of China (Grant Nos. 2009CB929503 and 2010CB923404), NCET-09-0296 and Southeast University, and
partially supported by the Natural Science Foundation of Jiangsu Province of China (Grant No. BK2010421). |
Cite this article:
Xu Qing-Yu(徐庆宇), Wen Zheng(温峥), Gao Jin-Long(高锦龙), Wu Di(吴迪), Qiu Teng(邱腾), Tang Shao-Long(唐少龙), and Xu Ming-Xiang(徐明祥) Multiferroic ZnO obtained by substituting oxygen with nitrogen 2011 Chin. Phys. B 20 087505
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