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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/76342
Ver los metadatos del registro completo
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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 Técnicas2025-09-03T10:07:11Zoai: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:34982025-09-03 10:07:11.797CONICET 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 |
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CONICET Digital (CONICET) |
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CONICET Digital (CONICET) |
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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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13.13397 |