Mn incorporation induced changes on structure and properties of N-doped ZnO

被引：9
作者：
Wu, Kongping [1 ,2 ]
Gu, Shulin [1 ,2 ]
Tang, Kun [1 ,2 ]
Zhu, Shunming [1 ,2 ]
Xu, Mingxiang [3 ]
Zhang, Rong [1 ,2 ]
Zheng, Youdou [1 ,2 ]
机构：
[1] Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China
[2] Nanjing Univ, Nanjing Natl Lab Microstruct, Nanjing 210093, Peoples R China
[3] Southeast Univ, Dept Phys, Nanjing 210096, Peoples R China
来源：
JOURNAL OF APPLIED PHYSICS | 2009年 / 106卷 / 11期
基金：
中国国家自然科学基金; 美国国家科学基金会;
关键词：
energy gap; exchange interactions (electron); ferromagnetic materials; II-VI semiconductors; lattice constants; magnetic thin films; manganese; nitrogen; semiconductor doping; semiconductor thin films; semimagnetic semiconductors; wide band gap semiconductors; X-ray photoelectron spectra; zinc compounds; ROOM-TEMPERATURE FERROMAGNETISM; DEPENDENCE; CARBON;
D O I：
10.1063/1.3266165
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The influences of Mn doping on the electrical and optical properties of the Zn1-xMnxO:N films have been investigated. Mn incorporation occupying on the Zn site has led the lattice constants and the bandgap of the films increased with the structural quality deteriorated. The electrical properties have been found to change significantly with the content of Mn in the films, due to the changes in the amount of the N-O acceptors and CN compensation centers formed in the films by Mn incorporation as revealed by x-ray photoelectron spectrometry measurements. The chemical states of Mn have been identified as Mn2+ and Mn4+, corresponding to Mn occupying on the Zn site and MnO2 second phase, respectively. The conductive type and the Mn2+ content of the films show a strong effect on the magnetic properties, which can be explained from the theoretical predication on the Mn 3d and N 2p ferromagnetic (hole) coupling on the ferromagnetism. However, uncompensated spins from nonuniform distribution of Mn atoms in ZnO may also be responsible for the observation of ferromagnetism signature at least on the high resistant samples.
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页数：6
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