Effect of atmosphere on the magnetic properties of the Co-doped ZnO magnetic semiconductors

被引：55

作者：

Cong, C. J. ^{[1
]}

Hong, J. H. ^{[1
]}

Zhang, K. L. ^{[1
,2
]}

机构：

[1] Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China

[2] Wuhan Univ, Ctr Nanosci & Nanotechnol Res, Wuhan 430072, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2009年 / 113卷 / 01期

关键词：

Nanoparticles; Semiconductors; Defects; Magnetic properties; ROOM-TEMPERATURE FERROMAGNETISM; FILMS;

D O I：

10.1016/j.matchemphys.2008.06.062

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Zn1-xCoxO nanoparticles were synthesized by theological phase reaction-precursor method in air and Ar, respectively. No secondary phase was observed with the sensitivity of XRD measurement. X-ray photoelectron spectroscopy and absorption spectra results indicated that Co2+ successfully incorporated into the wurtzite lattice at the Zn2+ sites. Raman spectra of Zn1-xCoxO obtained at air showed an additional broad vibrational mode, which can be attributed to disordered -Zn-O-Co- local vibrations; the mode of the samples obtained at Ar was not appeared. Magnetization measurements reveal ferromagnetism is only found in samples prepared in Ar revealing a close correlation between the defects and magnetic properties. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：435 / 440

页数：6

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