%0 Journal Article
%T Microstructure dependence of the electroresistance of Nd0.7Sr0.3MnO3<br>Nd0.7Sr0.3MnO3中显微结构相关电致电阻效应
%A Chen Shun-Sheng
%A Yang Chang-Ping
%A Deng Heng
%A Sun Zhi-Gang
%A <br>陈顺生
%A 杨昌平
%A 邓恒
%A 孙志刚
%J 物理学报
%D 2008
%I 
%X Nd0.7Sr0.3MnO3 ceramics of perovskite-type were respectively prepared by solid-state reaction and high-energy ball milling with post heating-treatment. The samples obtained using these methods show a great of difference in electrical transport despite having the same crystallographic structure, similar grain size and chemical composition. For the sample prepared by solid-state reaction, the electrical resistance keeps unchanged with current loads and no electroresistance effect takes place. However, for the sample prepared by high-energy ball milling with post heating treatment, the electrical resistance decreases remarkably with increasing current loads and shows colossal electroresistance effect. The microstructure of materials, in particular the screw dislocation-like structure, is supposed to be responsible for the difference in electrical transport.
%K electroresistance effect
%K microstructure
%K perovskite structure manganites
%K interface resistance<br>电致电阻效应，显微结构，钙钛矿结构锰氧化物，界面电阻
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=E395C4AAD6BAC65BE8DCA96007F2D609&yid=67289AFF6305E306&vid=11B4E5CC8CDD3201&iid=B31275AF3241DB2D&sid=5BAA7FEF9F14DABE&eid=973A2D19A6725087&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=18