Flux growth of ZnO crystals doped by transition metals

被引：11

作者：

Sofer, Zdenek ^{[1
]}

Sedmidubsky, David ^{[1
]}

Huber, Stepan ^{[1
,2
]}

Hejtmanek, Jiri ^{[2
]}

Marysko, Miroslav ^{[2
]}

Jurek, Karel ^{[2
]}

Mikulics, Martin ^{[3
,4
]}

机构：

[1] Inst Chem Technol, Dept Inorgan Chem, CR-16628 Prague 6, Czech Republic

[2] Acad Sci Czech Republ, Inst Phys, CR-16200 Prague 6, Czech Republic

[3] Forschungszentrum Julich, Inst Bio & Nanosyst IBN 1, D-52425 Julich, Germany

[4] JARA, Fundamentals Future Informat Technol, Julich, Germany

来源：

JOURNAL OF CRYSTAL GROWTH | 2011年 / 314卷 / 01期

关键词：

Growth from high temperature solutions; Oxides; Zinc compounds; Magnetic materials; Semiconducting II-VI materials; ROOM-TEMPERATURE PHOTOLUMINESCENCE; THIN-FILMS; SINGLE-CRYSTALS; FERROMAGNETISM; BULK; KOH; SAPPHIRE;

D O I：

10.1016/j.jcrysgro.2010.11.148

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

ZnO crystals doped with Cr, Mn, Fe and Co were grown by the flux method. The prepared crystals revealed no phase separation detectable by X-ray diffraction. Structure properties were characterized by Raman and photoluminescence spectroscopy. For ZnO:Co, Mn and Cr, no spontaneous ferromagnetic moment was observed up to T=2 K whereas for the ZnO:Fe crystals the m(H) curves suggest the existence of 5 nm superparamagnetic iron clusters. At low temperatures the m(H) curves can be interpreted as a superposition of major paramagnetic and minor antiferromagnetic contribution. The paramagnetic part corresponds to the presence of Co2+, Fe3+, Mn2+ ions and small Cr atom clusters. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.

引用

页码：123 / 128

页数：6

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