教師資料查詢 | 類別: 期刊論文 | 教師: 張經霖 CHANG, HENRY CHING-LIN (瀏覽個人網頁)

標題:Effect of Mn doping on the physical properties of misfit-layered Ca3Co4O9+δ
學年97
學期2
出版(發表)日期2009/07/01
作品名稱Effect of Mn doping on the physical properties of misfit-layered Ca3Co4O9+δ
作品名稱(其他語言)
著者Chen, J L; Liu, Y S; Liu, Chia-Jyi; Huang, L-C; Dong, C L; Chen, S S; Chang, C L
單位淡江大學物理學系
出版者
著錄名稱、卷期、頁數Journal of Physics D: Applied Physics 42(13), 135418(5pages)
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.
關鍵字
語言英文
ISSN0022-3727; 1361-6463
期刊性質國外
收錄於SCI;EI
產學合作
通訊作者Chang, C L
審稿制度
國別英國
公開徵稿
出版型式紙本
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