Absence of ferromagnetic order in high quality bulk Co-doped ZnO samples.

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dc.contributor.authorCarvalho, Hugo Bonette de
dc.contributor.authorGodoy, Marcio Peron Franco de
dc.contributor.authorPais, Rafael Witter Dias
dc.contributor.authorMir, Mirta
dc.contributor.authorZevallos, Ângela Maria Ortiz de
dc.contributor.authorIikawa, Fernando
dc.contributor.authorBrasil, Maria José Santos Pompeu
dc.contributor.authorChitta, Valmir Antônio
dc.contributor.authorFerraz, Wilmar Barbosa
dc.contributor.authorBoselli, Marco Aurélio
dc.contributor.authorSabioni, Antônio Claret Soares
dc.date.accessioned2012-07-13T14:18:25Z
dc.date.available2012-07-13T14:18:25Z
dc.date.issued2010
dc.description.abstractBulk Zn1−xCoxO samples were synthesized via standard solid-state reaction route with different Co molar concentrations up to 21%. A detailed microstructural analysis was carried out to investigate alternative sources of ferromagnetism, such as secondary phases and nanocrystals embedded in the bulk material. Conjugating different techniques we confirmed the Zn replacement by Co ions in the wurtzite ZnO structure, which retains, however, a high crystalline quality. No segregated secondary phases neither Co-rich nanocrystals were detected. Superconducting quantum interference device magnetometry demonstrates a paramagnetic Curie–Weiss behavior with antiferromagnetic interactions. We discuss the observed room temperature paramagnetism of our samples considering the current models for the magnetic properties of diluted magnetic semiconductors.pt_BR
dc.identifier.citationCARVALHO, H. B. de et al. Absence of ferromagnetic order in high quality bulk Co-doped ZnO samples. Journal of Applied Physics, v. 108, n. 3, p. 033914-1/033914-5, 2010. Disponível em: <https://aip.scitation.org/doi/full/10.1063/1.3459885>. Acesso em: 27 fev. . 2019.pt_BR
dc.identifier.issn00218979
dc.identifier.urihttp://www.repositorio.ufop.br/handle/123456789/1111
dc.language.isoen_USpt_BR
dc.rights.licenseO periódico Journal of Applied Physics permite o depósito da versão PDF do editor em Repositório Institucional. Fonte: Sherpa/Romeo <http://www.sherpa.ac.uk/romeo/search.php?issn=0021-8979>. Acesso em: 28 fev. 2014.
dc.titleAbsence of ferromagnetic order in high quality bulk Co-doped ZnO samples.pt_BR
dc.typeArtigo publicado em periodicopt_BR
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