高浓度Co掺杂ZnO晶体的水热法制备及磁性
Rengong Jingti Xuebao/Journal of Synthetic Crystals(2012)
Abstract
采用水热法以CoO、ZnO混合为前驱物制备了ZnO晶体,矿化剂为6 mol/L KOH,填充度70%,温度430℃,两种样品CoO、ZnO组分物质的量百分比分别为0.5∶1和1∶1.当前驱物为nCo∶nZn=0.5∶1时,合成出Zn1-xCoxO晶体,Co元素掺杂量分别为6.83 at%和9.30 at%.当前驱物中nCo∶nZn=1∶1时,Zn1-xCoxO晶体中Co掺杂比例达到9.31 at%,同时伴有Co3O4生成,其中Zn掺杂比例达到14.59 at%,SEM显示,所制备的Zn1-xCoxO具有明显的ZnO晶体特征,形态完整,最大尺度约为50 μm.SQUID测量显示,生成物中Zn1-xCoxO晶体具有顺磁性,Zn1-xCoxO和Co3-xZnxO混合晶体也显示为顺磁性.
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Key words
Diluted magnetic semiconductor,Hydrothermal method,ZnO crystals
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