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Evidence of Surface-Preferential Co Distribution in ZnO Nanocrystal and Its Effects on the Ferromagnetic Property
Hao, WC; Li, JJ; Xu, HZ; Wang, JO; Wang, TM; Wang JO(王嘉鸥)
2010
发表期刊ACS APPLIED MATERIALS & INTERFACES
卷号2期号:7页码:2053-2059
通讯作者[Hao, Weichang ; Li, Jianjun ; Wang, Tianmin] Beihang Univ, Ctr Mat Phys & Chem, Beijing 100191, Peoples R China ; [Xu, Huaizhe] Beihang Univ, Dept Phys, Beijing 100191, Peoples R China ; [Wang, Jiaou] Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China
文章类型Article
摘要Zn(0.95)Co(0.05)O nanocrystals were synthesized by the sol-gel method. A STEM image clearly shows that the Co in ZnO nanocrystals is of surface-preferential. To further study the distribution state of Co element and its effects on the structure and magnetic property, were postannealed the Zn(0.95)Co(0.05)O nanocrystals in O(2), Ar, and H(2) atmospheres. It is found that the ferromagnetisms of the H(2)- and Ar-annealed Zn(0.95)Co(0.05)O nandcrystals increase significantly, but that of the O(2)-annealed sample decreases. The ferromagnetism variations of the Ar- and O(2)-annealed sample are stemmed from the increase of oxygen vacancies (V(0)) and the formation of second-phase Co(3)O(4), respectively, whereas the great enhancement of ferromagnetism in the H(2)-annealed sample is attributed to the appearance of interstitial H (H(1)) related defects. Our results indicate that inhomogeneous Co distribution is helpful for manipulating the states of the Co ions and the ferromagnetic coupling In Zn(1-x)Co(x)O by post-treatment.
关键词surface-preferential distribution ZnO ferromagnetic property postannealing
学科领域Science & Technology - Other Topics; Materials Science
DOI10.1021/am100303n
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语种英语
WOS研究方向Science & Technology - Other Topics ; Materials Science
WOS类目Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号WOS:000280367000040
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被引频次:14[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/311005/239635
专题多学科研究中心
中国科学院高能物理研究所_中国散裂中子源
作者单位中国科学院高能物理研究所
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Hao, WC,Li, JJ,Xu, HZ,et al. Evidence of Surface-Preferential Co Distribution in ZnO Nanocrystal and Its Effects on the Ferromagnetic Property[J]. ACS APPLIED MATERIALS & INTERFACES,2010,2(7):2053-2059.
APA Hao, WC,Li, JJ,Xu, HZ,Wang, JO,Wang, TM,&王嘉鸥.(2010).Evidence of Surface-Preferential Co Distribution in ZnO Nanocrystal and Its Effects on the Ferromagnetic Property.ACS APPLIED MATERIALS & INTERFACES,2(7),2053-2059.
MLA Hao, WC,et al."Evidence of Surface-Preferential Co Distribution in ZnO Nanocrystal and Its Effects on the Ferromagnetic Property".ACS APPLIED MATERIALS & INTERFACES 2.7(2010):2053-2059.
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