Magnetic behavior of nanocrystalline MnCo2O4 spinels

Detalhes bibliográficos
Autor(a) principal: Araújo, José Humberto de
Data de Publicação: 2006
Outros Autores: Borges, Filipe Martel de Magalhães, Melo, Dulce Maria de Araújo, Câmara, M. S. A., Martinelli, Antonio Eduardo, Soares, João Maria, Cabral, F. A. O.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRN
Texto Completo: https://repositorio.ufrn.br/jspui/handle/123456789/29190
Resumo: A series of powders with different particle sizes of the spinel MnCo2O4 was synthesized by the Pechini method. The resulting precursor was calcined between 400 and 900o and characterized by thermogravimetric analyses (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM) and magnetization measurements. TGA analysis showed a loss of mass in the region from 200 to 650oC and stability after this. XRD patterns showed an increase of the crystallite size with calcination temperature. Magnetization measurements on the sample calcined at 900oC showed an unusual behavior of the hysteresis curve and irreversibility of the magnetization with field cooled (FC) and zero field cooled (ZFC) procedures. An evolution of this behavior was observed with increasing crystallite size
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spelling Araújo, José Humberto deBorges, Filipe Martel de MagalhãesMelo, Dulce Maria de AraújoCâmara, M. S. A.Martinelli, Antonio EduardoSoares, João MariaCabral, F. A. O.2020-06-09T17:28:44Z2020-06-09T17:28:44Z2006-07BORGES, F; MELO, D; CAMARA, M; MARTINELLI, A; SOARES, J. H.; ARAUJO, J; CABRAL, F. Magnetic behavior of nanocrystalline MnCo2O4 spinels. Journal of Magnetism and Magnetic Materials, v. 302, n.2, p. 273-277, 2006. Disponivel em: https://www.sciencedirect.com/science/article/abs/pii/S0304885305007535?via%3Dihub#!. Acesso em: 01 jun 2020. https://doi.org/10.1016/j.jmmm.2005.09.017.0304-8853https://repositorio.ufrn.br/jspui/handle/123456789/2919010.1016/j.jmmm.2005.09.017ElsevierAttribution 3.0 Brazilhttp://creativecommons.org/licenses/by/3.0/br/info:eu-repo/semantics/openAccessFerrimagnetMagnetizationMagnetic domainsNanoparticlesSpin glassMagnetic behavior of nanocrystalline MnCo2O4 spinelsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleA series of powders with different particle sizes of the spinel MnCo2O4 was synthesized by the Pechini method. The resulting precursor was calcined between 400 and 900o and characterized by thermogravimetric analyses (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM) and magnetization measurements. TGA analysis showed a loss of mass in the region from 200 to 650oC and stability after this. XRD patterns showed an increase of the crystallite size with calcination temperature. Magnetization measurements on the sample calcined at 900oC showed an unusual behavior of the hysteresis curve and irreversibility of the magnetization with field cooled (FC) and zero field cooled (ZFC) procedures. An evolution of this behavior was observed with increasing crystallite sizeengreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNLICENSElicense.txtlicense.txttext/plain; charset=utf-81484https://repositorio.ufrn.br/bitstream/123456789/29190/6/license.txte9597aa2854d128fd968be5edc8a28d9MD56TEXTMagneticBehaviorOfNanocrystalline_Araujo_2006.pdf.txtMagneticBehaviorOfNanocrystalline_Araujo_2006.pdf.txtExtracted texttext/plain13472https://repositorio.ufrn.br/bitstream/123456789/29190/7/MagneticBehaviorOfNanocrystalline_Araujo_2006.pdf.txt630d2eb1e51127832ff696aec1eb7ed5MD57THUMBNAILMagneticBehaviorOfNanocrystalline_Araujo_2006.pdf.jpgMagneticBehaviorOfNanocrystalline_Araujo_2006.pdf.jpgGenerated Thumbnailimage/jpeg1668https://repositorio.ufrn.br/bitstream/123456789/29190/8/MagneticBehaviorOfNanocrystalline_Araujo_2006.pdf.jpgfd59c6aa43ecd94727046de310984303MD58ORIGINALMagneticBehaviorOfNanocrystalline_Araujo_2006.pdfMagneticBehaviorOfNanocrystalline_Araujo_2006.pdfapplication/pdf962051https://repositorio.ufrn.br/bitstream/123456789/29190/4/MagneticBehaviorOfNanocrystalline_Araujo_2006.pdfe1770120f4a28ac403190577fd0044c1MD54CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8914https://repositorio.ufrn.br/bitstream/123456789/29190/5/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD55123456789/291902021-05-05 10:15:40.543oai:https://repositorio.ufrn.br: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Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2021-05-05T13:15:40Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false
dc.title.pt_BR.fl_str_mv Magnetic behavior of nanocrystalline MnCo2O4 spinels
title Magnetic behavior of nanocrystalline MnCo2O4 spinels
spellingShingle Magnetic behavior of nanocrystalline MnCo2O4 spinels
Araújo, José Humberto de
Ferrimagnet
Magnetization
Magnetic domains
Nanoparticles
Spin glass
title_short Magnetic behavior of nanocrystalline MnCo2O4 spinels
title_full Magnetic behavior of nanocrystalline MnCo2O4 spinels
title_fullStr Magnetic behavior of nanocrystalline MnCo2O4 spinels
title_full_unstemmed Magnetic behavior of nanocrystalline MnCo2O4 spinels
title_sort Magnetic behavior of nanocrystalline MnCo2O4 spinels
author Araújo, José Humberto de
author_facet Araújo, José Humberto de
Borges, Filipe Martel de Magalhães
Melo, Dulce Maria de Araújo
Câmara, M. S. A.
Martinelli, Antonio Eduardo
Soares, João Maria
Cabral, F. A. O.
author_role author
author2 Borges, Filipe Martel de Magalhães
Melo, Dulce Maria de Araújo
Câmara, M. S. A.
Martinelli, Antonio Eduardo
Soares, João Maria
Cabral, F. A. O.
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Araújo, José Humberto de
Borges, Filipe Martel de Magalhães
Melo, Dulce Maria de Araújo
Câmara, M. S. A.
Martinelli, Antonio Eduardo
Soares, João Maria
Cabral, F. A. O.
dc.subject.por.fl_str_mv Ferrimagnet
Magnetization
Magnetic domains
Nanoparticles
Spin glass
topic Ferrimagnet
Magnetization
Magnetic domains
Nanoparticles
Spin glass
description A series of powders with different particle sizes of the spinel MnCo2O4 was synthesized by the Pechini method. The resulting precursor was calcined between 400 and 900o and characterized by thermogravimetric analyses (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM) and magnetization measurements. TGA analysis showed a loss of mass in the region from 200 to 650oC and stability after this. XRD patterns showed an increase of the crystallite size with calcination temperature. Magnetization measurements on the sample calcined at 900oC showed an unusual behavior of the hysteresis curve and irreversibility of the magnetization with field cooled (FC) and zero field cooled (ZFC) procedures. An evolution of this behavior was observed with increasing crystallite size
publishDate 2006
dc.date.issued.fl_str_mv 2006-07
dc.date.accessioned.fl_str_mv 2020-06-09T17:28:44Z
dc.date.available.fl_str_mv 2020-06-09T17:28:44Z
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 BORGES, F; MELO, D; CAMARA, M; MARTINELLI, A; SOARES, J. H.; ARAUJO, J; CABRAL, F. Magnetic behavior of nanocrystalline MnCo2O4 spinels. Journal of Magnetism and Magnetic Materials, v. 302, n.2, p. 273-277, 2006. Disponivel em: https://www.sciencedirect.com/science/article/abs/pii/S0304885305007535?via%3Dihub#!. Acesso em: 01 jun 2020. https://doi.org/10.1016/j.jmmm.2005.09.017.
dc.identifier.uri.fl_str_mv https://repositorio.ufrn.br/jspui/handle/123456789/29190
dc.identifier.issn.none.fl_str_mv 0304-8853
dc.identifier.doi.none.fl_str_mv 10.1016/j.jmmm.2005.09.017
identifier_str_mv BORGES, F; MELO, D; CAMARA, M; MARTINELLI, A; SOARES, J. H.; ARAUJO, J; CABRAL, F. Magnetic behavior of nanocrystalline MnCo2O4 spinels. Journal of Magnetism and Magnetic Materials, v. 302, n.2, p. 273-277, 2006. Disponivel em: https://www.sciencedirect.com/science/article/abs/pii/S0304885305007535?via%3Dihub#!. Acesso em: 01 jun 2020. https://doi.org/10.1016/j.jmmm.2005.09.017.
0304-8853
10.1016/j.jmmm.2005.09.017
url https://repositorio.ufrn.br/jspui/handle/123456789/29190
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
rights_invalid_str_mv Attribution 3.0 Brazil
http://creativecommons.org/licenses/by/3.0/br/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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