%0 Journal Article
%T 共掺杂(Cr，Cu，Li)调控Co原子在Co掺杂的#br#ZnO磁性半导体中的分布
%A 陈琳
%A 胡凤春
%A 谈浩
%A 段恒利
%A 孙治湖
%A 闫文盛
%J 中国科学技术大学学报
%D 2016
%R 10.3969/j.issn.0253-2778.2016.10.002
%X 利用X射线吸收谱(XAFS)和X射线光电子能谱(XPS)等技术研究了共掺杂原子(Li，Cu，Cr)对Co原子在Co掺杂ZnO薄膜中分布形式的影响.在共掺杂前,Co原子以替代Zn原子的替代位和金属Co团簇两种形式存在.共掺杂Cr原子后,样品中的Co团簇消失,掺杂的Co原子只以替代位的形式分布在ZnO基体中.与之相反,共掺杂Cu(Li)原子后,样品中的Co团簇含量显著增加.进一步分析表明，共掺杂的Cr原子与Cu(Li)对Co原子分布形式具有截然不同的调控作用是与共掺杂原子在ZnO基体中的空间占位特点密切相关.</br>Abstract：X-ray absorption fine structure (XAFS) and X-ray photoelectron spectroscopy (XPS) were combined to study the effect of (Cr, Cu, Li) codopants on the distribution of magnetic Co atoms in Co-doped ZnO thin films. For the single-doping of Co in ZnO, there are two occupation sites of Co in ZnO: the substitutional sites for Zn and metallic Co clusters. After Cr doping, the metallic Co clusters vanish and all the Co atoms occupy the substitutional sites. On the contrary, Cu(Li)-codoping further increases the content of metallic Co clusters. In-depth analysis suggests that the distinct roles of Cr and Cu(Li) codopants for mediating the distribution of Co atoms in ZnO are intimately related to the occupation sites of codopants.
%K X射线吸收谱（XAFS）
%K 共掺杂
%K Co掺杂ZnO&lt
%K /br&gt
%K Key words： X-ray absorption fine structure (XAFS) codoping Co-codoped ZnO
%U http://just.ustc.edu.cn/CN/abstract/abstract226.shtml