Magnetic Properties of Mn, Cu Co-doped ZnO Crystals
WEI Zhi-ren;LI Zhe;HU Zhi-peng;LUO Xiao-ping;GAO Ping;WANG Wei-wei;DONG Guo-yi
2007, 36(5):
1155-1159.
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In this paper, Mn, Cu co-doped ZnO crystals were synthesized by hydrothermal method with 3mol/L-1KOH as mineralizer, the fill factor of 35;, reaction temperature of 430℃, and time of 24h.When the Zn(OH)2 mixed with Mn, Cu were used as precursor, the shape of the most crystals was column. The positive polar +c{0001}, negative polar -c{000(1-)}, negative pyramidal face -p{ 10(1-)(1-)},and column face m { (1-)010 } were exposed. The length of the column crystals was 30-50μm. Some of the crystals shape were hexagonal cone. The negative polar -c{000(1-)}, positive pyramidal face +p{10(1-)1},and column face m{(1-)010} were exposed. The length of the hexagonal cone crystals was 100μm. And the length to the diameter was 5:1. When the ZnO mixed with Mn, Cu were used as precursor, the length of the column crystals was 10-30μm. The hexagonal shape of all the crystals became asymmetry. The concentration of Mn2+ in ZnO was 3.19at; ,1.62at;, respectively,when the precursor was ZnO and Zn (OH) 2 by the EDX. But the Cu ions were not found. Although the morphology of the crystals was affected by Mn, Cu doped, antiferromagnet was observed by the SQUID.
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