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

doi:10.1088/1674-1056/22/10/107501

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 Zn_1-xMn_xO 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

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 Zn_1-xMn_xO 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

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/Abstract

摘要： Zn_1-xMn_xO (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: Zn_1-xMn_xO (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)

程岩, 郝维昌, 李文献, 许怀哲, 陈蕊, 窦士学. The variation of Mn-dopant distribution state with x and its effect on the magnetic coupling mechanism in Zn_1-xMn_xO nanocrystals[J]. 中国物理B, 2013, 22(10): 107501-107501.

Cheng Yan (程岩), Hao Wei-Chang (郝维昌), Li Wen-Xian (李文献), Xu Huai-Zhe (许怀哲), Chen Rui (陈蕊), Dou Shi-Xue (窦士学). The variation of Mn-dopant distribution state with x and its effect on the magnetic coupling mechanism in Zn_1-xMn_xO nanocrystals[J]. Chin. Phys. B, 2013, 22(10): 107501-107501.

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The variation of Mn-dopant distribution state with x and its effect on the magnetic coupling mechanism in Zn_1-xMn_xO nanocrystals

The variation of Mn-dopant distribution state with x and its effect on the magnetic coupling mechanism in Zn_1-xMn_xO nanocrystals

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