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

页码：1273 / 1278

页数：6

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