Mössbauer and magnetic study of nanocrystalline strontium hexaferrite prepared by an ionic coordination reaction technique

Detalhes bibliográficos
Autor(a) principal: Araújo, José Humberto de
Data de Publicação: 2013
Outros Autores: Soares, João Maria, Ginani, Marconi Floripe, Machado, Fernando L. A., Cunha, João Batista Marimon
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRN
Texto Completo: https://repositorio.ufrn.br/jspui/handle/123456789/29360
Resumo: Hard-magnetic nanocrystalline strontium hexaferrites SrFe12O19 were synthesized using an ionic coordination reaction technique. In this sample preparation technique the biopolymer chitosan was used as a nanoreactor. The obtained precursor powders were calcined at temperatures in the range 600–900 °C. The samples were analyzed by X-ray diffraction, transmission electron microscopy, Mössbauer spectroscopy and vibrating sample magnetometry. A complementary study of X-ray Rietveld refinement and Mössbauer spectroscopy shown that the hexaferrite phase formation is accompanied by formation of maghemite and hematite as intermediate phases. It was found that hexaferrite is present in the samples calcined at and above 600 °C but it is fully developed at 900 °C. For this sample the average particle size was found to be 41.6 nm. Magnetization measurements yielded squared hysteresis loops with a magnetization ratio () of 0.58 and a coercive field of 6.48 kOe. The overall results indicated that the particles in these samples are in the single domain regime and that the magnetization reversal in these particles is mainly due to coherent rotation
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spelling Araújo, José Humberto deSoares, João MariaGinani, Marconi FloripeMachado, Fernando L. A.Cunha, João Batista Marimon2020-06-25T17:33:34Z2020-06-25T17:33:34Z2013-10ARAÚJO, J.H.; SOARES, J.M.; GINANI, M.F.; MACHADO, F.L.A.; CUNHA, J.B.M.. Mössbauer and magnetic study of nanocrystalline strontium hexaferrite prepared by an ionic coordination reaction technique. Journal of Magnetism and Magnetic Materials, v. 343, p. 203-207, 2013. Disponível em: https://www.sciencedirect.com/science/article/pii/S0304885313003077?via%3Dihub#! Acesso em: 23 jun. 2020. https://doi.org/10.1016/j.jmmm.2013.04.077.0304-8853https://repositorio.ufrn.br/jspui/handle/123456789/2936010.1016/j.jmmm.2013.04.077ElsevierAttribution 3.0 Brazilhttp://creativecommons.org/licenses/by/3.0/br/info:eu-repo/semantics/openAccessSr-hexaferriteChemical synthesisX-ray diffractionMössbauer spectroscopyMagnetic propertyMössbauer and magnetic study of nanocrystalline strontium hexaferrite prepared by an ionic coordination reaction techniqueinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleHard-magnetic nanocrystalline strontium hexaferrites SrFe12O19 were synthesized using an ionic coordination reaction technique. In this sample preparation technique the biopolymer chitosan was used as a nanoreactor. The obtained precursor powders were calcined at temperatures in the range 600–900 °C. The samples were analyzed by X-ray diffraction, transmission electron microscopy, Mössbauer spectroscopy and vibrating sample magnetometry. A complementary study of X-ray Rietveld refinement and Mössbauer spectroscopy shown that the hexaferrite phase formation is accompanied by formation of maghemite and hematite as intermediate phases. It was found that hexaferrite is present in the samples calcined at and above 600 °C but it is fully developed at 900 °C. For this sample the average particle size was found to be 41.6 nm. Magnetization measurements yielded squared hysteresis loops with a magnetization ratio () of 0.58 and a coercive field of 6.48 kOe. The overall results indicated that the particles in these samples are in the single domain regime and that the magnetization reversal in these particles is mainly due to coherent rotationengreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNORIGINALMössbauerAndMagneticStudy_Araujo_2013.pdfMössbauerAndMagneticStudy_Araujo_2013.pdfapplication/pdf1052219https://repositorio.ufrn.br/bitstream/123456789/29360/1/M%c3%b6ssbauerAndMagneticStudy_Araujo_2013.pdf1fb2f1c96bb275d72ee5c00ae00ddec1MD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8914https://repositorio.ufrn.br/bitstream/123456789/29360/2/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD52LICENSElicense.txtlicense.txttext/plain; charset=utf-81484https://repositorio.ufrn.br/bitstream/123456789/29360/3/license.txte9597aa2854d128fd968be5edc8a28d9MD53TEXTMössbauerAndMagneticStudy_Araujo_2013.pdf.txtMössbauerAndMagneticStudy_Araujo_2013.pdf.txtExtracted texttext/plain20097https://repositorio.ufrn.br/bitstream/123456789/29360/4/M%c3%b6ssbauerAndMagneticStudy_Araujo_2013.pdf.txt306bdf70776a488520f4e1d632a4c1e3MD54THUMBNAILMössbauerAndMagneticStudy_Araujo_2013.pdf.jpgMössbauerAndMagneticStudy_Araujo_2013.pdf.jpgGenerated Thumbnailimage/jpeg1827https://repositorio.ufrn.br/bitstream/123456789/29360/5/M%c3%b6ssbauerAndMagneticStudy_Araujo_2013.pdf.jpgd9884bb8328b3d8615187205f66634b9MD55123456789/293602020-06-28 04:41:04.098oai:https://repositorio.ufrn.br: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Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2020-06-28T07:41:04Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false
dc.title.pt_BR.fl_str_mv Mössbauer and magnetic study of nanocrystalline strontium hexaferrite prepared by an ionic coordination reaction technique
title Mössbauer and magnetic study of nanocrystalline strontium hexaferrite prepared by an ionic coordination reaction technique
spellingShingle Mössbauer and magnetic study of nanocrystalline strontium hexaferrite prepared by an ionic coordination reaction technique
Araújo, José Humberto de
Sr-hexaferrite
Chemical synthesis
X-ray diffraction
Mössbauer spectroscopy
Magnetic property
title_short Mössbauer and magnetic study of nanocrystalline strontium hexaferrite prepared by an ionic coordination reaction technique
title_full Mössbauer and magnetic study of nanocrystalline strontium hexaferrite prepared by an ionic coordination reaction technique
title_fullStr Mössbauer and magnetic study of nanocrystalline strontium hexaferrite prepared by an ionic coordination reaction technique
title_full_unstemmed Mössbauer and magnetic study of nanocrystalline strontium hexaferrite prepared by an ionic coordination reaction technique
title_sort Mössbauer and magnetic study of nanocrystalline strontium hexaferrite prepared by an ionic coordination reaction technique
author Araújo, José Humberto de
author_facet Araújo, José Humberto de
Soares, João Maria
Ginani, Marconi Floripe
Machado, Fernando L. A.
Cunha, João Batista Marimon
author_role author
author2 Soares, João Maria
Ginani, Marconi Floripe
Machado, Fernando L. A.
Cunha, João Batista Marimon
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Araújo, José Humberto de
Soares, João Maria
Ginani, Marconi Floripe
Machado, Fernando L. A.
Cunha, João Batista Marimon
dc.subject.por.fl_str_mv Sr-hexaferrite
Chemical synthesis
X-ray diffraction
Mössbauer spectroscopy
Magnetic property
topic Sr-hexaferrite
Chemical synthesis
X-ray diffraction
Mössbauer spectroscopy
Magnetic property
description Hard-magnetic nanocrystalline strontium hexaferrites SrFe12O19 were synthesized using an ionic coordination reaction technique. In this sample preparation technique the biopolymer chitosan was used as a nanoreactor. The obtained precursor powders were calcined at temperatures in the range 600–900 °C. The samples were analyzed by X-ray diffraction, transmission electron microscopy, Mössbauer spectroscopy and vibrating sample magnetometry. A complementary study of X-ray Rietveld refinement and Mössbauer spectroscopy shown that the hexaferrite phase formation is accompanied by formation of maghemite and hematite as intermediate phases. It was found that hexaferrite is present in the samples calcined at and above 600 °C but it is fully developed at 900 °C. For this sample the average particle size was found to be 41.6 nm. Magnetization measurements yielded squared hysteresis loops with a magnetization ratio () of 0.58 and a coercive field of 6.48 kOe. The overall results indicated that the particles in these samples are in the single domain regime and that the magnetization reversal in these particles is mainly due to coherent rotation
publishDate 2013
dc.date.issued.fl_str_mv 2013-10
dc.date.accessioned.fl_str_mv 2020-06-25T17:33:34Z
dc.date.available.fl_str_mv 2020-06-25T17:33:34Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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status_str publishedVersion
dc.identifier.citation.fl_str_mv ARAÚJO, J.H.; SOARES, J.M.; GINANI, M.F.; MACHADO, F.L.A.; CUNHA, J.B.M.. Mössbauer and magnetic study of nanocrystalline strontium hexaferrite prepared by an ionic coordination reaction technique. Journal of Magnetism and Magnetic Materials, v. 343, p. 203-207, 2013. Disponível em: https://www.sciencedirect.com/science/article/pii/S0304885313003077?via%3Dihub#! Acesso em: 23 jun. 2020. https://doi.org/10.1016/j.jmmm.2013.04.077.
dc.identifier.uri.fl_str_mv https://repositorio.ufrn.br/jspui/handle/123456789/29360
dc.identifier.issn.none.fl_str_mv 0304-8853
dc.identifier.doi.none.fl_str_mv 10.1016/j.jmmm.2013.04.077
identifier_str_mv ARAÚJO, J.H.; SOARES, J.M.; GINANI, M.F.; MACHADO, F.L.A.; CUNHA, J.B.M.. Mössbauer and magnetic study of nanocrystalline strontium hexaferrite prepared by an ionic coordination reaction technique. Journal of Magnetism and Magnetic Materials, v. 343, p. 203-207, 2013. Disponível em: https://www.sciencedirect.com/science/article/pii/S0304885313003077?via%3Dihub#! Acesso em: 23 jun. 2020. https://doi.org/10.1016/j.jmmm.2013.04.077.
0304-8853
10.1016/j.jmmm.2013.04.077
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