中国物理B ›› 2013, Vol. 22 ›› Issue (10): 107501-107501.doi: 10.1088/1674-1056/22/10/107501

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

The variation of Mn-dopant distribution state with x and its effect on the magnetic coupling mechanism in Zn1-xMnxO nanocrystals

程岩a, 郝维昌a b, 李文献b c, 许怀哲a, 陈蕊d, 窦士学b   

  1. a Department of Physics and Center of Materials Physics and Chemistry, Beihang University, Beijing 100191, China;
    b Institute for Superconducting and Electronic Materials (ISEM), University of Wollongong, Wollongong, NSW 2522, Australia;
    c Solar Energy Technologies, School of Computing, Engineering and Mathematics, University of Western Sydney, Penrith, NSW 2751, Australia;
    d State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China
  • 收稿日期:2013-04-16 修回日期:2013-05-09 出版日期:2013-08-30 发布日期:2013-08-30
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 013CB934001) and the National Natural Science Foundation of China (Grant No. 51272015).

The variation of Mn-dopant distribution state with x and its effect on the magnetic coupling mechanism in Zn1-xMnxO nanocrystals

Cheng Yan (程岩)a, Hao Wei-Chang (郝维昌)a b, Li Wen-Xian (李文献)b c, Xu Huai-Zhe (许怀哲)a, Chen Rui (陈蕊)d, Dou Shi-Xue (窦士学)b   

  1. a Department of Physics and Center of Materials Physics and Chemistry, Beihang University, Beijing 100191, China;
    b Institute for Superconducting and Electronic Materials (ISEM), University of Wollongong, Wollongong, NSW 2522, Australia;
    c Solar Energy Technologies, School of Computing, Engineering and Mathematics, University of Western Sydney, Penrith, NSW 2751, Australia;
    d State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China
  • Received:2013-04-16 Revised:2013-05-09 Online:2013-08-30 Published:2013-08-30
  • Contact: Hao Wei-Chang, Xu Huai-Zhe E-mail:whao@buaa.edu.cn;hzxu@buaa.edu.cn
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No. 013CB934001) and the National Natural Science Foundation of China (Grant No. 51272015).

摘要: Zn1-xMnxO (x=0.0005, 0.001, 0.005, 0.01, 0.02) nanocrystals are synthesized by using a wet chemical process. The coordination environment of Mn is characterized by X-ray photoelectron spectroscopy, Raman spectroscopy, and its X-ray absorption fine structure. It is found that the solubility of substitutional Mn in a ZnO lattice is very low, which is less than 0.4%. Mn ions first dissolve into the substitutional sites in the ZnO lattice, thereby forming Mn2+O4 tetrahedral coordination when x ≤ 0.001, then entering into the interstitial sites and forming Mn3+O6 octahedral coordination when x ≥ 0.005. All the samples exhibit paramagnetic behaviors at room temperature, and antiferromagnetic coupling can be observed below 100 K.

关键词: magnetic semiconductors, X-ray absorption fine structure, impurity distribution, exchange and superexchange interactions

Abstract: Zn1-xMnxO (x=0.0005, 0.001, 0.005, 0.01, 0.02) nanocrystals are synthesized by using a wet chemical process. The coordination environment of Mn is characterized by X-ray photoelectron spectroscopy, Raman spectroscopy, and its X-ray absorption fine structure. It is found that the solubility of substitutional Mn in a ZnO lattice is very low, which is less than 0.4%. Mn ions first dissolve into the substitutional sites in the ZnO lattice, thereby forming Mn2+O4 tetrahedral coordination when x ≤ 0.001, then entering into the interstitial sites and forming Mn3+O6 octahedral coordination when x ≥ 0.005. All the samples exhibit paramagnetic behaviors at room temperature, and antiferromagnetic coupling can be observed below 100 K.

Key words: magnetic semiconductors, X-ray absorption fine structure, impurity distribution, exchange and superexchange interactions

中图分类号:  (Magnetic semiconductors)

  • 75.50.Pp
78.70.Dm (X-ray absorption spectra) 61.72.sh (Impurity distribution) 75.30.Et (Exchange and superexchange interactions)