%0 Journal Article
%T Metal-insulator transition and spin-glass behavior in Eu2-xPbxRu2O7 system<br>Eu2－xPbxRu2O7中的金属-绝缘体相变和自旋玻璃态行为
%A Qiu Mei-Qing
%A Fang Ming-Hu
%A <br>邱梅清
%A 方明虎
%J 物理学报
%D 2006
%I 
%X The investigation on the structure, resistivity and susceptibility was carried out for Eu2-xPbxRu2O7 (x=0.0, 0.2, 0.4, 0.6, 0.8, 1.0 and 1.8) samples. It is found that the resistivity of the samples, the local magnetic moment of Ru4+ and the freezing temperature TG of spin glass decrease gradually with the increasing substitution concentration value x of Pb for Eu in Eu2-xPbxRu2O7 system. A metal-insulator (M-I) transition occurs near x=0.8. It is suggested that in this system the partial substitution of Pb2+ for Eu3+ results in the increasing of carrier concentration. And the mixing of 6p band of Pb and the t2g band of Ru 4d electrons brings about an enhancement of itinerary for Ru 4d electrons.
%K spin frustration
%K Eu2-xPbxRu2O7system
%K M-I transition
%K spin glass<br>自旋几何受挫，
%K Eu2-xPbxRu2O7体系，
%K 金属-绝缘体相变，
%K 自旋玻璃态
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=1095B59D52472CBF&yid=37904DC365DD7266&vid=E514EE58E0E50ECF&iid=9CF7A0430CBB2DFD&sid=2D2FEC5105F43154&eid=E4CF324EE5F75329&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=20