Effects of Ni concentration on structural, magnetic and optical properties of Ni-doped ZnO nanoparticles

被引：69
|
作者：
Liu, Yang [1 ,2 ]
Liu, Hongbo [1 ,2 ]
Chen, Zhenguo [3 ]
Kadasala, Naveen [3 ]
Mao, Chenyi [3 ]
Wang, Yaxin [1 ]
Zhang, Yongjun [1 ]
Liu, Huilian [1 ]
Liu, Yanqing [1 ]
Yang, Jinghai [1 ]
Yan, Yongsheng [2 ]
机构：
[1] Jilin Normal Univ, Inst Condensed State Phys, Siping 136000, Peoples R China
[2] Jiangsu Univ, Inst Chem & Chem Engn, Zhenjiang 212013, Peoples R China
[3] Purdue Univ, Dept Chem, W Lafayette, IN 47907 USA
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 604卷
基金：
中国国家自然科学基金;
关键词：
Diluted magnetic semiconductors; Sol-gel method; Structure; Magnetic properties; SOL-GEL METHOD; THIN-FILMS; FERROMAGNETISM; PHOTOLUMINESCENCE; NANOCRYSTALS; COPRECIPITATION;
D O I：
10.1016/j.jallcom.2014.03.079
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Ni-doped zinc oxide (Zn-1 xNixO, 0 <= x <= 0.08) diluted magnetic semiconductors have been synthesized by the using a sol-gel method. Structural, magnetic and optical properties of the samples have been studied. The results of X-ray diffraction (XRD), transmission electron microscope (TEM) and X-ray absorption fine structure (XAFS) indicated that Ni ions were substitutionally incorporated into the crystal lattice of ZnO. With Ni concentration increasing up to 2 at.%, all diffraction peaks corresponded to wurtzite structure of ZnO, but for Zn0.97Ni0.03O, secondary phase of NiO emerged. Based on the results of X-ray photoelectron spectroscopy (XPS), Ni incorporated into the ZnO lattice as Ni2+. The produced samples showed good high-Tc (Curie temperature) ferromagnetism. The results of vibrating sample magnetometer (VSM) and photoluminescence (PL) showed that ferromagnetism (FM) of the Ni-doped ZnO nanoparticles originated from the presence of the O vacancy. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：281 / 285
页数：5
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