Intrinsic ferromagnetic properties in Cr-doped ZnO diluted magnetic semiconductors

被引：74
|
作者：
Liu, Yang [1 ,2 ]
Yang, Yanting [1 ,2 ]
Yang, Jinghai [1 ,2 ]
Guan, Qingfeng [3 ]
Liu, Huilian [1 ,2 ]
Yang, Lili [1 ,2 ]
Zhang, Yongjun [1 ,2 ]
Wang, Yaxin [1 ,2 ]
Wei, Maobin [1 ,2 ]
Liu, Xiaoyan [1 ,2 ]
Fei, Lianhua [1 ,2 ]
Cheng, Xin [1 ,2 ]
机构：
[1] Jilin Normal Univ, Inst Condensed State Phys, Siping 136000, Peoples R China
[2] Jilin Normal Univ, Minist Educ, Key Lab Funct Mat Phys & Chem, Siping 136000, Jilin, Peoples R China
[3] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 210013, Peoples R China
来源：
JOURNAL OF SOLID STATE CHEMISTRY | 2011年 / 184卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Semiconductors; Sol-gel method; XAFS; Magnetic properties; ROOM-TEMPERATURE FERROMAGNETISM; FILMS; PHOTOLUMINESCENCE; TRANSITION; DIFFUSION;
D O I：
10.1016/j.jssc.2011.03.049
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The Cr-doped zinc oxide (Zn1-xCrxO, 0 <= x <= 0.08) diluted magnetic semiconductors have been synthesized successfully by the sol-gel method. Investigations on magnetic, optical and structural properties of the produced samples have been done. Energy dispersive spectroscopy (EDS) shows the existence of Cr ion in the Cr-doped ZnO. The results of X-ray diffraction (XRD), the transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and X-ray absorption fine structure (XAFS) indicate that the Cr ions are at least partially substitutionally incorporated into the crystal lattice of ZnO. The produced samples show good high-T-c (Curie temperature) ferromagnetism (FM) in Cr-doped ZnO nanoparticles with Cr concentration of less than 5 at%. The results of photoluminescence (PL) further testify that FM is an intrinsic property of the Cr-doped ZnO nanoparticles. And the occurrence of FM should mainly contribute to the Cr doping. (C) 2011 Elsevier Inc. All rights reserved.
引用
收藏
页码：1273 / 1278
页数：6
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