Paramagnetism in Cu-doped ZnO

doi:10.1088/1674-1056/19/7/077501

中国物理B ›› 2010, Vol. 19 ›› Issue (7): 77501-077501.doi: 10.1088/1674-1056/19/7/077501

Paramagnetism in Cu-doped ZnO

龚佑品¹, 徐庆宇², 郑晓红²

(1)Department of Materials Science and Engineering, Nanjing University, Nanjing 210008, China; (2)Department of Physics, Southeast University, Nanjing 211189, China

收稿日期:2009-11-10 修回日期:2010-01-05 出版日期:2010-07-15 发布日期:2010-07-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 50802041), the National Key Projects for Basic Research of China (Grant No. 2010CB923404), and Southeast University.

Paramagnetism in Cu-doped ZnO

Xu Qing-Yu(徐庆宇)^a)†, Zheng Xiao-Hong(郑晓红)^a), and Gong You-Pin(龚佑品)^b)

^a Department of Physics, Southeast University, Nanjing 211189, China; ^b Department of Materials Science and Engineering, Nanjing University, Nanjing 210008, China

Received:2009-11-10 Revised:2010-01-05 Online:2010-07-15 Published:2010-07-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 50802041), the National Key Projects for Basic Research of China (Grant No. 2010CB923404), and Southeast University.

摘要/Abstract

摘要： Zn_0.98Cu_0.02O powders are prepared by the sol—gel method. A small number of CuO impurity phases are observed by the x-ray diffraction, indicating the solubility of Cu in ZnO is less than 2 at.%. The Zn_0.98Cu_0.02O powders exhibit diamagnetism at 300 K and paramagnetism at 5 K. After subtracting the diamagnetic contribution of ZnO bulk and the paramagnetic contribution of defects, Cu ions exhibit weak paramagnetism. By codoping Cu with Co or Mn in ZnO, only paramagnetism is observed at room temperature.

Abstract: Zn_0.98Cu_0.02O powders are prepared by the sol—gel method. A small number of CuO impurity phases are observed by the x-ray diffraction, indicating the solubility of Cu in ZnO is less than 2 at.%. The Zn_0.98Cu_0.02O powders exhibit diamagnetism at 300 K and paramagnetism at 5 K. After subtracting the diamagnetic contribution of ZnO bulk and the paramagnetic contribution of defects, Cu ions exhibit weak paramagnetism. By codoping Cu with Co or Mn in ZnO, only paramagnetism is observed at room temperature.

Key words: diluted magnetic semiconductors, ZnO, paramagnetism, defects

中图分类号: (Nonmetals)

75.20.Ck

61.72.uj (III-V and II-VI semiconductors) 81.20.Ev (Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation) 81.20.Fw (Sol-gel processing, precipitation) 64.75.-g (Phase equilibria) 75.50.Pp (Magnetic semiconductors)

徐庆宇, 郑晓红, 龚佑品. Paramagnetism in Cu-doped ZnO[J]. 中国物理B, 2010, 19(7): 77501-077501.

Xu Qing-Yu(徐庆宇), Zheng Xiao-Hong(郑晓红), and Gong You-Pin(龚佑品). Paramagnetism in Cu-doped ZnO[J]. Chin. Phys. B, 2010, 19(7): 77501-077501.

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Paramagnetism in Cu-doped ZnO

Paramagnetism in Cu-doped ZnO

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