期刊論文
| 學年 | 96 |
|---|---|
| 學期 | 2 |
| 出版（發表）日期 | 2008-06-01 |
| 作品名稱 | Investigation of the valence states of Fe and Co in Fe1−xCoxOy (0 < x < 1) thin films by x-ray absorption spectroscopy |
| 作品名稱（其他語言） | |
| 著者 | Chen, C. L.; Dong, C. L.; Rao, S. M.; Chern, G.; Chen, M. C.; 張經霖; Chang, Ching-lin |
| 單位 | 淡江大學物理學系 |
| 出版者 | Institute of Physics (IOP) |
| 著錄名稱、卷期、頁數 | Journal of Physics: Condensed Matter 20(25), pp.255236(4 pages) |
| 摘要 | The unusual magnetic properties of thin films of Fe1−xCoxOy {0≤x≤1} ferrite solid solutions have been explained through an investigation of their electronic structure. The x-ray absorption near-edge structure (XANES) spectra of the Fe L3-edge and K-edges show that Co replaces Fe3+ in the tetrahedral (Td) sites up to x = 0.34 and octahedral (Oh) sites from 0.39<x<0.89. The Co L3-edge and O K-edge results indicate mixed valence states of Co as it replaces Fe at dissimilar sites. From the results, it is concluded that the magnetic properties of the thin films of the spinel Fe1−xCoxOy arise from the Fe3+ at the Td sites. The replacement of Fe3+ and Fe2+ by Co at the Oh sites results in a crossover to the rocksalt structure and a loss of the magnetic properties. |
| 關鍵字 | |
| 語言 | en |
| ISSN | 0953-8984 |
| 期刊性質 | 國外 |
| 收錄於 | |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 否 |
| 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/987654321/27622 ) |