物理学报2011，Vol.60Issue(11)：565-573,9.
Nd0.7Sr0.3MnO3陶瓷EPIR效应的起源
The origin of EPIR effect in Nd_（0.7）Sr_（0.3）MnO_3 ceramics
摘要
Abstract
Polycrystalline ceramic Nd0.7Sr0.3MnO3 is synthesized using high-energy ball milling and post heat treatment method.The properties of electric transport are measured using direct current （DC） 4-wire and 2-wire methods.The results show that both the grain （phase） boundary and the electrode-bulk contact interface has interfacial resistance and space charge layer.The two kinds of space charge regions have greatly different effects on the DC transport：for the former,the I-V curve exhibits nonlinear characteristic and no EPIR effect takes place;for the later,however,an obvious EPIR effect is observed even if the I-V curve also shows nonlinear behaviour.It well suggests that for the ceramic Nd0.7Sr0.3MnO3,only the electrode-bulk contact interface can induce the EPIR effect although there is a similar nonlinear I-V characteristic for the grain （phase） boundary and the electrode-bulk contact interface.关键词
电脉冲诱导电阻转变（EPIR）/亚锰酸盐/空间电荷层/I-V非线性Key words
EPIR/manganite/space charge layer/nonlinearity分类
信息技术与安全科学引用本文复制引用
杨昌平,陈顺生,戴琪,宋学平..Nd0.7Sr0.3MnO3陶瓷EPIR效应的起源[J].物理学报,2011,60(11):565-573,9.基金项目
国家自然科学基金 （）
教育部新世纪优秀人才支持计划（批准号：NCET-08-0674）资助的课题~~ （）
