水热合成Zn_(0.95)Ni_(0.05)O稀磁半导体纳米晶(英文)  

HYDROTHERMAL SYNTHESIS OF Zn_(0.95)Ni_(0.05)O DILUTED MAGNETIC SEMICONDUCTOR NANOCRYSTALS

作　　者：李慧勤[1] 苗鸿雁[1] 谈国强[1] 安百江[2] 鲁文豪[1] 李锋娟[1] 

机构地区：[1]陕西科技大学材料科学与工程学院,西安710021 [2]陕西宝光集团有限公司,陕西宝鸡721304

出　　处：《硅酸盐学报》2008年第11期1514-1517,共4页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(50672055);国家科技攻关(2006BAF02A28)资助项目

摘　　要：采用水热法,分别以2mol/L的NaOH和KOH作为矿化剂,在240℃保温24h,合成了Zn0.95Ni0.05O稀磁半导体纳米晶粉体。X射线衍射结果表明:Ni离子取代Zn离子,并且没有出现杂质相。紫外–可见光吸收光谱测试进一步表明,Ni离子已进入ZnO晶格内;采用能谱测试表明,Ni离子的实际掺杂摩尔分数为3.20%。室温下,通过振动样品磁强计测试表明,所制备的Zn0.95Ni0.05O纳米晶体具有优良的铁磁性能。Zn0.95Ni0.05O diluted magnetic semiconductor powder was prepared by the hydrothermal method at 240 ℃ for 24 h with 2 mol/L NaOH or 2 mol/L KOH as mineralizer. X-ray diffraction （XRD） and ultraviolet-visible （UV-Vis） spectrometry were employed to demonstrate the presence of Ni ions in substitution of Zn sites. The XRD analysis indicates that the as-prepared Ni-doped ZnO has a pure ZnO wurtzite structure. The UV-Vis measurements demonstrate the presence of Ni2＋ in substitution of Zn2＋. The energy dispersive spectroscopy analysis shows that the mole fraction of true doping Ni2＋ in the semiconductor is 3.20%. The magnetic properties of the sample were measured by vibrating sample magnetometry at room temperature. The results reveal that the Ni-doped ZnO samples have ferromagnetic behavior and the repeatability of the tests is very good.

关 键 词：掺镍氧化锌半导体 水热法 铁磁性 

分 类 号：O781[理学—晶体学]