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

Detalhes bibliográficos
Autor(a) principal: Carvalho, Hugo Bonette de
Data de Publicação: 2010
Outros Autores: Godoy, Marcio Peron Franco de, Pais, Rafael Witter Dias, Mir, Mirta, Zevallos, Ângela Maria Ortiz de, Iikawa, Fernando, Brasil, Maria José Santos Pompeu, Chitta, Valmir Antônio, Ferraz, Wilmar Barbosa, Boselli, Marco Aurélio, Sabioni, Antônio Claret Soares
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFOP
Texto Completo: http://www.repositorio.ufop.br/handle/123456789/1111
Resumo: Bulk 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.
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spelling Carvalho, Hugo Bonette deGodoy, Marcio Peron Franco dePais, Rafael Witter DiasMir, MirtaZevallos, Ângela Maria Ortiz deIikawa, FernandoBrasil, Maria José Santos PompeuChitta, Valmir AntônioFerraz, Wilmar BarbosaBoselli, Marco AurélioSabioni, Antônio Claret Soares2012-07-13T14:18:25Z2012-07-13T14:18:25Z2010CARVALHO, 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. . 2019.00218979http://www.repositorio.ufop.br/handle/123456789/1111Bulk 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.Absence of ferromagnetic order in high quality bulk Co-doped ZnO samples.info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleO 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.info:eu-repo/semantics/openAccessengreponame:Repositório Institucional da UFOPinstname:Universidade Federal de Ouro Preto (UFOP)instacron:UFOPLICENSElicense.txtlicense.txttext/plain; charset=utf-81748http://www.repositorio.ufop.br/bitstream/123456789/1111/5/license.txt8a4605be74aa9ea9d79846c1fba20a33MD55ORIGINALARTIGO_AbsenceFerromagneticOrder.pdfARTIGO_AbsenceFerromagneticOrder.pdfapplication/pdf923111http://www.repositorio.ufop.br/bitstream/123456789/1111/1/ARTIGO_AbsenceFerromagneticOrder.pdf6a4ad3dd521a23ed5dcf7f509393e521MD51123456789/11112019-02-27 09:34:48.103oai:localhost: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Repositório InstitucionalPUBhttp://www.repositorio.ufop.br/oai/requestrepositorio@ufop.edu.bropendoar:32332019-02-27T14:34:48Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP)false
dc.title.pt_BR.fl_str_mv Absence of ferromagnetic order in high quality bulk Co-doped ZnO samples.
title Absence of ferromagnetic order in high quality bulk Co-doped ZnO samples.
spellingShingle Absence of ferromagnetic order in high quality bulk Co-doped ZnO samples.
Carvalho, Hugo Bonette de
title_short Absence of ferromagnetic order in high quality bulk Co-doped ZnO samples.
title_full Absence of ferromagnetic order in high quality bulk Co-doped ZnO samples.
title_fullStr Absence of ferromagnetic order in high quality bulk Co-doped ZnO samples.
title_full_unstemmed Absence of ferromagnetic order in high quality bulk Co-doped ZnO samples.
title_sort Absence of ferromagnetic order in high quality bulk Co-doped ZnO samples.
author Carvalho, Hugo Bonette de
author_facet Carvalho, Hugo Bonette de
Godoy, Marcio Peron Franco de
Pais, Rafael Witter Dias
Mir, Mirta
Zevallos, Ângela Maria Ortiz de
Iikawa, Fernando
Brasil, Maria José Santos Pompeu
Chitta, Valmir Antônio
Ferraz, Wilmar Barbosa
Boselli, Marco Aurélio
Sabioni, Antônio Claret Soares
author_role author
author2 Godoy, Marcio Peron Franco de
Pais, Rafael Witter Dias
Mir, Mirta
Zevallos, Ângela Maria Ortiz de
Iikawa, Fernando
Brasil, Maria José Santos Pompeu
Chitta, Valmir Antônio
Ferraz, Wilmar Barbosa
Boselli, Marco Aurélio
Sabioni, Antônio Claret Soares
author2_role author
author
author
author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Carvalho, Hugo Bonette de
Godoy, Marcio Peron Franco de
Pais, Rafael Witter Dias
Mir, Mirta
Zevallos, Ângela Maria Ortiz de
Iikawa, Fernando
Brasil, Maria José Santos Pompeu
Chitta, Valmir Antônio
Ferraz, Wilmar Barbosa
Boselli, Marco Aurélio
Sabioni, Antônio Claret Soares
description Bulk 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.
publishDate 2010
dc.date.issued.fl_str_mv 2010
dc.date.accessioned.fl_str_mv 2012-07-13T14:18:25Z
dc.date.available.fl_str_mv 2012-07-13T14:18:25Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.citation.fl_str_mv CARVALHO, 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.
dc.identifier.uri.fl_str_mv http://www.repositorio.ufop.br/handle/123456789/1111
dc.identifier.issn.none.fl_str_mv 00218979
identifier_str_mv CARVALHO, 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.
00218979
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