%0 Journal Article
%T Enhanced Magnetoresistance of (La0.67Ca0.33MnO3) Composites Coated byZn0.95Co0.05O<br>
%A ZHUANG Bin
%A XU Yan
%A LAI Heng
%A HUANG Zhi-Gao
%A CHEN Shui-Yuan
%A LIN Ying-Bin
%A LI Shang-Dong
%A LAI Fa-Chun
%A <br>
%J 中国物理快报
%D 2009
%I 
%X La0.7Ca0.3MnO3:xZn0.95Co0.05O (x = 0.0, 0.05, 0.1, 0.15 mol) composites are prepared by a sol-gel process. X-ray diffraction and energy diffraction spectroscopy reveal that there is no evidence of a reaction between the La0.7Ca0.3MnO3(LCMO) and Zn0.95Co0.05O (ZCO). Magnetization M, Curie temperature TC and metal-insulator transition temperatures Tp are observed to decrease with increasing ZCO content. Compared with x = 0.0, a great enhancement in the magnetoresistance (MR) is observed at around TC for x = 0.05, 0.10, 0.15. Based on the tunneling MR and percolation models, this great change of MR is well explained.
%K 75
%K 47
%K Gk
%K 75
%K 47
%K Lx
%K 75
%K 75
%K +a<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=E27DA92E19FE279A273627875A70D74D&aid=B8E14FA40D6607F3302DB922991143DF&yid=DE12191FBD62783C&vid=96C778EE049EE47D&iid=94C357A881DFC066&journal_id=0256-307X&journal_name=中国物理快报&referenced_num=0&reference_num=0