Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/4763
Title: Evidence of defect-mediated magnetic coupling on hydrogenated Co-doped ZnO.
Authors: Godoy, Marcio Peron Franco de
Mesquita, Alexandre
Avansi Junior, Waldir
Neves, P. P.
Chitta, Valmir Antônio
Ferraz, Wilmar Barbosa
Boselli, Marco Aurélio
Sabioni, Antônio Claret Soares
Carvalho, Hugo Bonette de
Keywords: Solid state reactions
Oxide materials
Magnetically ordered materials
X-ray diffraction
Scaning tunnelling microscopy
Issue Date: 2013
Citation: GODOY, M. P. F. de et al. Evidence of defect-mediated magnetic coupling on hydrogenated Co-doped ZnO. Journal of Alloys and Compounds, v. 555, p. 315-319, 2013. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0925838812020890>. Acesso em: 13 fev. 2015.
Abstract: Hydrogenated bulk Zn1_xCoxO samples were synthesized via standard solid-state reaction route with Co molar concentrations up to 15 at.%. Magnetic characterization demonstrates a room temperature ferromagnetic behavior associated to a paramagnetic Curie–Weiss component. Detailed microstructural analysis was carried out to exclude the presence of extrinsic sources of ferromagnetism. The magnetization increases linearly as a function of Co concentration. Hall measurements reveal an insulating character for the whole set of samples. In this context, the defect mediated magnetic coupling between the Co atoms under the scope of the bound magnetic polarons model is used to interpret the observed room temperature ferromagnetism.
URI: http://www.repositorio.ufop.br/handle/123456789/4763
metadata.dc.identifier.doi: https://doi.org/10.1016/j.jallcom.2012.11.105
ISSN: 0925-8388
metadata.dc.rights.license: O periódico Journal of Alloys and Compounds concede permissão para depósito do artigo no Repositório Institucional da UFOP. Número da licença: 3566050895727.
Appears in Collections:DEFIS - Artigos publicados em periódicos

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