Evidence of substitutional Co ion clusters in Zn(1-x)Co(x)O dilute magnetic semiconductors
文献类型：期刊论文
| 作者 | Sun, ZH ; Yan, WS; Zhang, GB; Oyanagi, H; Wu, ZY; Liu, QH; Wu, WQ; Shi, TF; Pan, ZY; Xu, PS
|
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2008 |
| 卷号 | 77期号:24页码:245208 |
| 通讯作者 | [Sun, Zhihu ; Yan, Wensheng ; Zhang, Guobin ; Oyanagi, Hiroyuki ; Wu, Ziyu ; Liu, Qinghua ; Wu, Wenqing ; Shi, Tongfei ; Pan, Zhiyun ; Xu, Pengshou ; Wei, Shiqiang] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China ; [Sun, Zhihu ; Oyanagi, Hiroyuki] Natl Inst Adv Ind Sci & Technol, Photon Res Inst, Tsukuba, Ibaraki 3058568, Japan ; [Wu, Ziyu] Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China |
| 英文摘要 | Structural studies become increasingly important for understanding the nature of magnetic properties in dilute magnetic semiconductors (DMSs) [K. Ando, Science 312, 1883 (2006)]. In this work, x-ray absorption fine structure (XAFS) at both Co and O K edges is used to investigate the Co occupation sites and distributions in Zn(1-x)Co(x)O thin films with low Co concentrations (x=0.005,0.02). Co K-edge XAFS analysis indicates unambiguously that the doped Co ions are substantially incorporated into the ZnO host lattice. However, the O K-edge XAFS spectral features are strikingly different from those of ZnO and Zn(1-x)Co(x)O reported in the literature so far, and can be reproduced by the assembling of substitutional Co ions around intervening oxygen atoms. This provides experimental evidence for numerous theoretical predications that the substitutional Co ions in ZnO tend to gather together. It is expected that similar phenomenon can also be observed by XAFS in a number of other ZnO-, GaN-, and TiO(2)-based DMSs for which the clustering of substitutional dopants have been previously predicted. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Condensed Matter |
| 研究领域[WOS] | Physics |
| 原文出处 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000257289700054 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/241050]  |
| 专题 | 高能物理研究所_多学科研究中心 高能物理研究所_实验物理中心 高能物理研究所_计算中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Sun, ZH,Yan, WS,Zhang, GB,et al. Evidence of substitutional Co ion clusters in Zn(1-x)Co(x)O dilute magnetic semiconductors[J]. PHYSICAL REVIEW B,2008,77(24):245208. |
| APA | Sun, ZH.,Yan, WS.,Zhang, GB.,Oyanagi, H.,Wu, ZY.,...&吴自玉.(2008).Evidence of substitutional Co ion clusters in Zn(1-x)Co(x)O dilute magnetic semiconductors.PHYSICAL REVIEW B,77(24),245208. |
| MLA | Sun, ZH,et al."Evidence of substitutional Co ion clusters in Zn(1-x)Co(x)O dilute magnetic semiconductors".PHYSICAL REVIEW B 77.24(2008):245208. |
入库方式： OAI收割
来源：高能物理研究所
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