%0 Journal Article
%T Defect-Bound Carrier Mediated Room-Temperature Ferromagnetism in Co-Doped ZnO Powders
%A WEN Qi-Ye
%A ZHANG Huai-Wu
%A SONG Yuan-Qiang
%A YANG Qing-Hui John QXiao
%A <br>文岐业
%A 张怀武
%A 宋远强
%A 杨青慧
%A John．Xiao
%J 中国物理快报
%D 2007
%I 
%X We prepare pure single-phase Co：ZnO powders introducing controllable interstitial Zni by Zn vapour annealing. The as-ground powder shows that no room-temperature ferromagnetism （RT-FM） exists, while the Zn vapour treated samples exhibit unambiguous RT-FM with a maximum magnetic moment of 0.2μB/Co. The FM of Co：ZnO strongly depends on the Zn diffusion process, suggesting that not only carriers but also Zni defects play an important role in mediating FM in diluted magnetic semiconductors. A new core-shell model is proposed to interpret the mixture behaviour of FM and paramagnetism observed in the Zn vapour annealed Co：ZnO powders.
%K 75
%K 50
%K Pp
%K 81
%K 40
%K Ef
%K 61
%K 72
%K Ww<br>铁磁体
%K 室温
%K 钴
%K 氧化锌
%K 粉末
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=E27DA92E19FE279A273627875A70D74D&aid=9BF1E5DC433F0E4D2F7804B93B32447F&yid=A732AF04DDA03BB3&vid=B91E8C6D6FE990DB&iid=F3090AE9B60B7ED1&sid=FAE697EF7DB29B61&eid=D58B400F0C66CC96&journal_id=0256-307X&journal_name=中国物理快报&referenced_num=0&reference_num=0