Effects of rare earths doping on electrical transport properties of CaMnO3 oxide - 文章详情页

作者：

Zhang, F.-P. (Zhang, F.-P..) | Zeng, H. (Zeng, H..) | Lu, Q.-M. (Lu, Q.-M..) | Zhang, X. (Zhang, X..) | Zhang, J.-X. (Zhang, J.-X..)

收录：

Scopus PKU CSCD

摘要：

The　rare　earths　doped　Ca0.95RE0.05MnO3　(RE=Pr,　Eu,　Tb)　oxide　bulk　samples　are　prepared　by　combining　Sol-gel　method　and　ceramics　fabrication　method,　the　samples　have　been　analyzed　by　X-ray　diffraction,　scanning　electron　microscopy　and　electrical　constants　measuring　apparatus.　The　results　show　that　all　the　doped　samples　are　of　single　phase　with　dense　microstructure　within　the　5%　doping　content;　the　lattice　is　diminished　for　all　doped　samples;　the　un-doped　CaMnO3　exhibits　semiconductor　behavior　with　moderately　high　electrical　resistivity　reaching　340　mΩ·cm　at　373　K;　the　electrical　resistivity　for　the　doped　samples　is　reduced　with　identical　transportation　mechanism,　showing　slightly　enhanced　resistivity　value　along　with　Pr,　Eu　and　Tb;　the　energy　needed　for　polaron　carrier　to　hop　is　narrowed　by　doping;　the　praseodymium　doped　Ca0.95Pr0.05MnO3　sample　is　found　possessing　lowest　electrical　resistivity　reaching　8　mΩ·cm　at　373　K,　which　is　far　lower　than　that　of　the　parent　sample.

关键词：

CaMnO3; Electrical transport property; Rare earth doping

作者机构：

[ 1 ] [Zhang, F.-P.]Institute of Physics, Henan University of Urban Construction, Pingdingshan 467036, China
[ 2 ] [Zeng, H.]Beijing Key Laboratory of Energy Nanomaterials, Advance Technology and Materials Co., Ltd, China Iron and steel Research Institute Group, Beijing 100081, China
[ 3 ] [Lu, Q.-M.]College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China
[ 4 ] [Zhang, X.]College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China
[ 5 ] [Zhang, J.-X.]College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China

通讯作者信息：

[Zhang, F.-P.]Institute of Physics, Henan University of Urban Construction, Pingdingshan 467036, China

电子邮件地址：

zhfpeng@yahoo.com.cn

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