Journal Article

PreJuSER-13776

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Flux growth of ZnO crystals doped by transition metals

Sofer, Z. ; Sedmidubský, D. ; Huber, S. ; Hejtmánek, J. ; Marysko, M. ; Jurek, K. ; Mikulics, M.FZJ*

2011
Elsevier Amsterdam [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.jcrysgro.2010.11.148

Abstract: 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.

Keyword(s): J ; Growth from high temperature solutions (auto) ; Oxides (auto) ; Zinc compounds (auto) ; Magnetic materials (auto) ; Semiconducting II-VI materials (auto)

Note: This work was supported by the Czech Science Foundation (Project no. 104/09/0621) and Ministry of Education of the Czech Republic (Project no. MSM6046137302).

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Contributing Institute(s):

1. Halbleiter-Nanoelektronik (IBN-1)
2. Jülich-Aachen Research Alliance - Fundamentals of Future Information Technology (JARA-FIT)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)

Appears in the scientific report 2011

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