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Flux growth of ZnO crystals doped by transition metals
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SYSNO ASEP 0374228 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Flux growth of ZnO crystals doped by transition metals Author(s) Sofer, Z. (CZ)
Sedmidubský, D. (CZ)
Huber, Š. (CZ)
Hejtmánek, Jiří (FZU-D) RID, ORCID
Maryško, Miroslav (FZU-D) RID
Jurek, Karel (FZU-D) RID, ORCID, SAI
Mikulics, M. (DE)Source Title Journal of Crystal Growth. - : Elsevier - ISSN 0022-0248
Roč. 314, č. 1 (2011), 123-128Number of pages 6 s. Language eng - English Country NL - Netherlands Keywords growth from high temperature solutions ; oxides ; zinc compounds ; magnetic materials ; semiconducting ii–vi materials Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GA104/09/0621 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z10100521 - FZU-D (2005-2011) UT WOS 000286853400025 DOI https://doi.org/10.1016/j.jcrysgro.2010.11.148 Annotation 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 andCr,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 5nm 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. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2012
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