National Changhua University of Education Institutional Repository : Item 987654321/14252
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 6507/11669
造访人次 : 29955604      在线人数 : 569
RC Version 3.2 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜寻范围 进阶搜寻

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://ir.ncue.edu.tw/ir/handle/987654321/14252

题名: Effect of Mn Doping on the Physical Properties of Misfit-layered Ca3Co4O9+δ
作者: Chen, J. L.;Liu, Y. S.;Liu, Chia-Jyi;Huang, L. C.;Dong, C. L.;Chen, S. S.;Chang, C. L.
贡献者: 物理學系
日期: 2009
上传时间: 2012-09-10T06:15:49Z
出版者: IOP Publishing
摘要: We have carried out an x-ray absorption near-edge structure (XANES) study on a series of misfit-layered cobaltites Ca3Co4−xMnxO9+δ (x = 0, 0.05, 0.1, 0.15). In this system, the average valences of Co and Mn, according to Co and Mn K-edge measurements are about 3.50+ and 3+, respectively. Both the trivalent and tetravalent Co are of low-spin configurations as confirmed by our magnetization measurements. The variations of absorption intensities of Co L2,3-edge and O K-edge XANES with respect to the Mn doping concentration (x) are analysed. Co L2,3-edge results show that the Co 3d unoccupied states decrease with x, which correlate well with the trend of variation of thermoelectric power. O K-edge results indicate that the number of O 2p unoccupied states decreases with x, which implies a decrease in the majority charge carriers (hole) concentration upon partial substitution of Mn for Co.
關聯: J. Phys. D: Appl. Phys., 42(13): 135418
显示于类别:[物理學系] 期刊論文

文件中的档案:

档案 大小格式浏览次数
index.html0KbHTML674检视/开启


在NCUEIR中所有的数据项都受到原著作权保护.

 

DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回馈