The Morin transition in nanostructured pseudocubic hematite: effect of the intercrystallite magnetic exchange

Autores
Bengoa, Jose Fernando; Alvarez, Ana María; Bianchi, Ana Elisa; Punte, Graciela Maria; Vandenberghe, R.E.; Mercader, Roberto Carlos; Marchetti, Sergio Gustavo
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Morin transition in α-Fe2O3 particles with homogeneous pseudocubic morphology of about 1.8 μm side has been studied by different techniques. The particles are made up of nanometric crystallites with a narrow size distribution. Samples annealed at 673, 773 and 873 K, yielded Morin transition temperatures, TM, of about 230, 241, and 245 K, respectively, which are lower than the bulk value, TM ≈ 263 K. In addition, the temperature range ΔTM through which these samples undergo the transition is very narrow with respect to the values reported in the literature. Ranges of 20, 10 and 8 K, were obtained for the samples annealed at 673, 773 and 873 K. In this work, through the estimation of the exchange magnetic energy, we demonstrate that the existence of the Morin transition, and its shift and breadth are related to the presence of intercrystallite interactions within the pseudocubic particles. These intercrystallite interactions are modified by the annealing treatments, which help to remove non-stoichiometric hydroxyl groups and incorporated water molecules. © 2010 Elsevier B.V. All rights reserved.
Fil: Bengoa, Jose Fernando. Facultad de Ciencias Exactas, Universidad Nacional de la Plata; Argentina
Fil: Alvarez, Ana María. Facultad de Ciencias Exactas, Universidad Nacional de la Plata; Argentina
Fil: Bianchi, Ana Elisa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
Fil: Punte, Graciela Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
Fil: Vandenberghe, R.E.. University of Ghent; Bélgica
Fil: Mercader, Roberto Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
Fil: Marchetti, Sergio Gustavo. Facultad de Ciencias Exactas, Universidad Nacional de la Plata; Argentina
Materia
Magnetic Materials
Nanostructures
Mössbauer Spectroscopy
Magnetic Properties
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/76342
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/76342
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling The Morin transition in nanostructured pseudocubic hematite: effect of the intercrystallite magnetic exchangeBengoa, Jose FernandoAlvarez, Ana MaríaBianchi, Ana ElisaPunte, Graciela MariaVandenberghe, R.E.Mercader, Roberto CarlosMarchetti, Sergio GustavoMagnetic MaterialsNanostructuresMössbauer SpectroscopyMagnetic Propertieshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The Morin transition in α-Fe2O3 particles with homogeneous pseudocubic morphology of about 1.8 μm side has been studied by different techniques. The particles are made up of nanometric crystallites with a narrow size distribution. Samples annealed at 673, 773 and 873 K, yielded Morin transition temperatures, TM, of about 230, 241, and 245 K, respectively, which are lower than the bulk value, TM ≈ 263 K. In addition, the temperature range ΔTM through which these samples undergo the transition is very narrow with respect to the values reported in the literature. Ranges of 20, 10 and 8 K, were obtained for the samples annealed at 673, 773 and 873 K. In this work, through the estimation of the exchange magnetic energy, we demonstrate that the existence of the Morin transition, and its shift and breadth are related to the presence of intercrystallite interactions within the pseudocubic particles. These intercrystallite interactions are modified by the annealing treatments, which help to remove non-stoichiometric hydroxyl groups and incorporated water molecules. © 2010 Elsevier B.V. All rights reserved.Fil: Bengoa, Jose Fernando. Facultad de Ciencias Exactas, Universidad Nacional de la Plata; ArgentinaFil: Alvarez, Ana María. Facultad de Ciencias Exactas, Universidad Nacional de la Plata; ArgentinaFil: Bianchi, Ana Elisa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; ArgentinaFil: Punte, Graciela Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; ArgentinaFil: Vandenberghe, R.E.. University of Ghent; BélgicaFil: Mercader, Roberto Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; ArgentinaFil: Marchetti, Sergio Gustavo. Facultad de Ciencias Exactas, Universidad Nacional de la Plata; ArgentinaElsevier Science Sa2010-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/76342Bengoa, Jose Fernando; Alvarez, Ana María; Bianchi, Ana Elisa; Punte, Graciela Maria; Vandenberghe, R.E.; et al.; The Morin transition in nanostructured pseudocubic hematite: effect of the intercrystallite magnetic exchange; Elsevier Science Sa; Materials Chemistry and Physics; 123; 1; 9-2010; 191-1980254-0584CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.matchemphys.2010.03.081info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0254058410002877info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:32:39Zoai:ri.conicet.gov.ar:11336/76342instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:32:39.324CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The Morin transition in nanostructured pseudocubic hematite: effect of the intercrystallite magnetic exchange
title The Morin transition in nanostructured pseudocubic hematite: effect of the intercrystallite magnetic exchange
spellingShingle The Morin transition in nanostructured pseudocubic hematite: effect of the intercrystallite magnetic exchange
Bengoa, Jose Fernando
Magnetic Materials
Nanostructures
Mössbauer Spectroscopy
Magnetic Properties
title_short The Morin transition in nanostructured pseudocubic hematite: effect of the intercrystallite magnetic exchange
title_full The Morin transition in nanostructured pseudocubic hematite: effect of the intercrystallite magnetic exchange
title_fullStr The Morin transition in nanostructured pseudocubic hematite: effect of the intercrystallite magnetic exchange
title_full_unstemmed The Morin transition in nanostructured pseudocubic hematite: effect of the intercrystallite magnetic exchange
title_sort The Morin transition in nanostructured pseudocubic hematite: effect of the intercrystallite magnetic exchange
dc.creator.none.fl_str_mv Bengoa, Jose Fernando
Alvarez, Ana María
Bianchi, Ana Elisa
Punte, Graciela Maria
Vandenberghe, R.E.
Mercader, Roberto Carlos
Marchetti, Sergio Gustavo
author Bengoa, Jose Fernando
author_facet Bengoa, Jose Fernando
Alvarez, Ana María
Bianchi, Ana Elisa
Punte, Graciela Maria
Vandenberghe, R.E.
Mercader, Roberto Carlos
Marchetti, Sergio Gustavo
author_role author
author2 Alvarez, Ana María
Bianchi, Ana Elisa
Punte, Graciela Maria
Vandenberghe, R.E.
Mercader, Roberto Carlos
Marchetti, Sergio Gustavo
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Magnetic Materials
Nanostructures
Mössbauer Spectroscopy
Magnetic Properties
topic Magnetic Materials
Nanostructures
Mössbauer Spectroscopy
Magnetic Properties
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The Morin transition in α-Fe2O3 particles with homogeneous pseudocubic morphology of about 1.8 μm side has been studied by different techniques. The particles are made up of nanometric crystallites with a narrow size distribution. Samples annealed at 673, 773 and 873 K, yielded Morin transition temperatures, TM, of about 230, 241, and 245 K, respectively, which are lower than the bulk value, TM ≈ 263 K. In addition, the temperature range ΔTM through which these samples undergo the transition is very narrow with respect to the values reported in the literature. Ranges of 20, 10 and 8 K, were obtained for the samples annealed at 673, 773 and 873 K. In this work, through the estimation of the exchange magnetic energy, we demonstrate that the existence of the Morin transition, and its shift and breadth are related to the presence of intercrystallite interactions within the pseudocubic particles. These intercrystallite interactions are modified by the annealing treatments, which help to remove non-stoichiometric hydroxyl groups and incorporated water molecules. © 2010 Elsevier B.V. All rights reserved.
Fil: Bengoa, Jose Fernando. Facultad de Ciencias Exactas, Universidad Nacional de la Plata; Argentina
Fil: Alvarez, Ana María. Facultad de Ciencias Exactas, Universidad Nacional de la Plata; Argentina
Fil: Bianchi, Ana Elisa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
Fil: Punte, Graciela Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
Fil: Vandenberghe, R.E.. University of Ghent; Bélgica
Fil: Mercader, Roberto Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
Fil: Marchetti, Sergio Gustavo. Facultad de Ciencias Exactas, Universidad Nacional de la Plata; Argentina
description The Morin transition in α-Fe2O3 particles with homogeneous pseudocubic morphology of about 1.8 μm side has been studied by different techniques. The particles are made up of nanometric crystallites with a narrow size distribution. Samples annealed at 673, 773 and 873 K, yielded Morin transition temperatures, TM, of about 230, 241, and 245 K, respectively, which are lower than the bulk value, TM ≈ 263 K. In addition, the temperature range ΔTM through which these samples undergo the transition is very narrow with respect to the values reported in the literature. Ranges of 20, 10 and 8 K, were obtained for the samples annealed at 673, 773 and 873 K. In this work, through the estimation of the exchange magnetic energy, we demonstrate that the existence of the Morin transition, and its shift and breadth are related to the presence of intercrystallite interactions within the pseudocubic particles. These intercrystallite interactions are modified by the annealing treatments, which help to remove non-stoichiometric hydroxyl groups and incorporated water molecules. © 2010 Elsevier B.V. All rights reserved.
publishDate 2010
dc.date.none.fl_str_mv 2010-09
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/76342
Bengoa, Jose Fernando; Alvarez, Ana María; Bianchi, Ana Elisa; Punte, Graciela Maria; Vandenberghe, R.E.; et al.; The Morin transition in nanostructured pseudocubic hematite: effect of the intercrystallite magnetic exchange; Elsevier Science Sa; Materials Chemistry and Physics; 123; 1; 9-2010; 191-198
0254-0584
CONICET Digital
CONICET
url http://hdl.handle.net/11336/76342
identifier_str_mv Bengoa, Jose Fernando; Alvarez, Ana María; Bianchi, Ana Elisa; Punte, Graciela Maria; Vandenberghe, R.E.; et al.; The Morin transition in nanostructured pseudocubic hematite: effect of the intercrystallite magnetic exchange; Elsevier Science Sa; Materials Chemistry and Physics; 123; 1; 9-2010; 191-198
0254-0584
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.matchemphys.2010.03.081
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0254058410002877
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science Sa
publisher.none.fl_str_mv Elsevier Science Sa
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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