Influence of growth temperature on ferromagnetism of Mn-doped ZnO nanorod

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作者：
Key Laboratory of Low Dimensional Materials and Application Technology, Faculty of Materials, Optoelectronics and Physics, Xiangtan University, Xiangtan 411105, China [1 ]
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来源：
Guangdianzi Jiguang | 2008年 / 1卷 / 58-61期
关键词：
Coercive field - Dilute magnetic semiconductor (DMS) - Manganese doped zinc oxide nanorod;
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摘要：
Mn doped ZnO nanorods are prepared at the growth temperatures of 600°C, 650°C and 700°C by a chemical vapor deposition method without using any catalysts. It is found that, oxygen vacancy concentration increases with the increment of substrate temperature. Oxygen vacancies with low concentration can enhance the ferromagnetism of Mn-doped ZnO nanorods. However, at very high oxygen vacancy concentration, a large paramagnetic or anti-ferromagnetic effect will be observed In Mn-doped ZnO nanorods. The sample grown at 650°C has the strongest room temperature ferromagnetism with a saturation magnetization of 0.85 μB/Mn and a coercive field of 50 Oe.
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