Mössbauer and magnetic study of nanocrystalline strontium hexaferrite prepared by an ionic coordination reaction technique
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , , |
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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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 |
format |
article |
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 |
url |
https://repositorio.ufrn.br/jspui/handle/123456789/29360 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
Attribution 3.0 Brazil http://creativecommons.org/licenses/by/3.0/br/ info:eu-repo/semantics/openAccess |
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Attribution 3.0 Brazil http://creativecommons.org/licenses/by/3.0/br/ |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Elsevier |
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Elsevier |
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reponame:Repositório Institucional da UFRN instname:Universidade Federal do Rio Grande do Norte (UFRN) instacron:UFRN |
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UFRN |
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UFRN |
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Repositório Institucional da UFRN |
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