Paramagnetism in Cu-doped ZnO  

作　　者：徐庆宇 郑晓红 龚佑品 

机构地区：[1]Department of Physics,Southeast University [2]Department of Materials Scienceand Engineering,Nanjing University

出　　处：《Chinese Physics B》2010年第7期537-540,共4页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 50802041);the National Key Projects for Basic Research of China (Grant No. 2010CB923404);Southeast University

摘　　要：Zn0.98Cu0.020 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 Zn0.98Cu0.020 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.Zn0.98Cu0.020 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 Zn0.98Cu0.020 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.

关 键 词：diluted magnetic semiconductors ZNO PARAMAGNETISM DEFECTS 

分 类 号：TB383.3[一般工业技术—材料科学与工程]