Evidence of substitutional Co ion clusters in Zn(1-x)Co(x)O dilute magnetic semiconductors
Sun, ZH; Yan, WS; Zhang, GB; Oyanagi, H; Wu, ZY; Liu, QH; Wu, WQ; Shi, TF; Pan, ZY; Xu, PS; Wei, SQ; Wu ZY(吴自玉)
刊名PHYSICAL REVIEW B
2008
卷号77期号:24页码:245208
学科分类Physics
DOI10.1103/PhysRevB.77.245208
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
文章类型Article
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.
类目[WOS]Physics, Condensed Matter
研究领域[WOS]Physics
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语种英语
WOS记录号WOS:000257289700054
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被引频次:50[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/241050
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
作者单位中国科学院高能物理研究所
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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.
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