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

页码：281 / 285

页数：5

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