共 29 条
Structure and ferromagnetic properties of Co-doped ZnO powders
被引:48
作者:

Xu, Xingyan
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机构:
Beijing Inst Technol, Res Ctr Mat Sci, Beijing 100081, Peoples R China Beijing Inst Technol, Res Ctr Mat Sci, Beijing 100081, Peoples R China

Cao, Chuanbao
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机构:
Beijing Inst Technol, Res Ctr Mat Sci, Beijing 100081, Peoples R China Beijing Inst Technol, Res Ctr Mat Sci, Beijing 100081, Peoples R China
机构:
[1] Beijing Inst Technol, Res Ctr Mat Sci, Beijing 100081, Peoples R China
基金:
中国国家自然科学基金;
关键词:
Diluted magnetic semiconductor;
Co-doped ZnO;
Optical properties;
Magnetic properties;
ROOM-TEMPERATURE FERROMAGNETISM;
THIN-FILMS;
MAGNETIC SEMICONDUCTORS;
ENHANCEMENT;
ZN1-XCOXO;
BULK;
D O I:
10.1016/j.jmmm.2009.01.017
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
Single-phase Zn1-xCoxO (x = 0.02, 0.04) powders were synthesized by a simple co-precipitation technique. X-ray diffraction analysis reveals that the Co-doped ZnO crystallizes in a wurtzite structure. The lattice constants of Co-doped ZnO powders decrease slightly when Co is doped into ZnO. Optical absorption spectra show a decrease in the bandgap with increasing Co content and also give an evidence of the presence of Co2+ ions in tetrahedral sites. Raman spectra indicate that Co doping increased the lattice defects and induced another Raman vibration mode around at 538 cm(-1), which is an indicator for the incorporation of Co2+ ions into the ZnO host matrix. Magnetic measurement reveals that the Zn1-xCoxO (x = 0.02, 0.04) powders clearly exhibit room-temperature ferromagnetic behavior, which makes them potentially useful as building components for spintronics. (c) 2009 Elsevier B.V. All rights reserved.
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页码:2216 / 2219
页数:4
相关论文
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