期刊論文
| 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 | en |
| ISSN | 0022-3727; 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 | 是 |
| 國別 | GBR |
| 公開徵稿 | |
| 出版型式 | 紙本 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/72760 ) |