High temperature emissivity, reflectivity, and x-ray absorption of BiFeO3

Autores
Massa, Nestor Emilio; del Campo, Leire; de Sousa Meneses, Domingos; Echegut, Patrick; Fabbris, Gilberto F. L.; Azevedo, Gustavo; Martínez Lope, María Jesus; Alonso, José Antonio
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We report on the lattice evolution of BiFeO3 as function of temperature using far infrared emissivity, reflectivity, and x-ray absorption local structure. A power law fit to the lowest frequency soft phonon in the magnetic ordered phase yields an exponent = 0.25 as for a tricritical point. At about 200 K below TN 640 K it ceases softening as consequence of BiFeO3 metastability. We identified this temperature as corresponding to a crossover transition to an order-disorder regime. Above 700 K strong band overlapping, merging, and smearing of modes are consequence of thermal fluctuations and chemical disorder. Vibrational modes show band splits in the ferroelectric phase as emerging from triple degenerated species as from a paraelectric cubic phase above TC 1090 K. Temperature dependent x-ray absorption near edge structure XANES at the Fe K edge shows that lower temperature Fe3+ turns into Fe2+. While this matches the FeO wüstite XANES profile, the Bi LIII-edge downshift suggests a high temperature very complex bond configuration at the distorted A perovskite site. Overall, our local structural measurements reveal high temperature defect-induced irreversible lattice changes, below, and above the ferroelectric transition, in an environment lacking of long-range coherence. We did not find an insulator to metal transition prior to melting.
Fil: Massa, Nestor Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Química Inorgánica "Dr. Pedro J. Aymonino". Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Química Inorgánica "Dr. Pedro J. Aymonino"; Argentina
Fil: del Campo, Leire. Centre National de la Recherche Scientifique; Francia
Fil: de Sousa Meneses, Domingos. Centre National de la Recherche Scientifique; Francia
Fil: Echegut, Patrick. Centre National de la Recherche Scientifique; Francia
Fil: Fabbris, Gilberto F. L.. Universidade Estadual de Campinas; Brasil
Fil: Azevedo, Gustavo. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Martínez Lope, María Jesus. Instituto de Ciencia de Materiales de Madrid; España
Fil: Alonso, José Antonio. Instituto de Ciencia de Materiales de Madrid; España
Materia
BiFeO3
MULTIFERROIC
FAR INFRARED EMISSIVITY
FAR INFRARED REFLECTIVITY
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:11336/129699
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/129699
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling High temperature emissivity, reflectivity, and x-ray absorption of BiFeO3Massa, Nestor Emiliodel Campo, Leirede Sousa Meneses, DomingosEchegut, PatrickFabbris, Gilberto F. L.Azevedo, GustavoMartínez Lope, María JesusAlonso, José AntonioBiFeO3MULTIFERROICFAR INFRARED EMISSIVITYFAR INFRARED REFLECTIVITYhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We report on the lattice evolution of BiFeO3 as function of temperature using far infrared emissivity, reflectivity, and x-ray absorption local structure. A power law fit to the lowest frequency soft phonon in the magnetic ordered phase yields an exponent = 0.25 as for a tricritical point. At about 200 K below TN 640 K it ceases softening as consequence of BiFeO3 metastability. We identified this temperature as corresponding to a crossover transition to an order-disorder regime. Above 700 K strong band overlapping, merging, and smearing of modes are consequence of thermal fluctuations and chemical disorder. Vibrational modes show band splits in the ferroelectric phase as emerging from triple degenerated species as from a paraelectric cubic phase above TC 1090 K. Temperature dependent x-ray absorption near edge structure XANES at the Fe K edge shows that lower temperature Fe3+ turns into Fe2+. While this matches the FeO wüstite XANES profile, the Bi LIII-edge downshift suggests a high temperature very complex bond configuration at the distorted A perovskite site. Overall, our local structural measurements reveal high temperature defect-induced irreversible lattice changes, below, and above the ferroelectric transition, in an environment lacking of long-range coherence. We did not find an insulator to metal transition prior to melting.Fil: Massa, Nestor Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Química Inorgánica "Dr. Pedro J. Aymonino". Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Química Inorgánica "Dr. Pedro J. Aymonino"; ArgentinaFil: del Campo, Leire. Centre National de la Recherche Scientifique; FranciaFil: de Sousa Meneses, Domingos. Centre National de la Recherche Scientifique; FranciaFil: Echegut, Patrick. Centre National de la Recherche Scientifique; FranciaFil: Fabbris, Gilberto F. L.. Universidade Estadual de Campinas; BrasilFil: Azevedo, Gustavo. Universidade Federal do Rio Grande do Sul; BrasilFil: Martínez Lope, María Jesus. Instituto de Ciencia de Materiales de Madrid; EspañaFil: Alonso, José Antonio. Instituto de Ciencia de Materiales de Madrid; EspañaAmerican Institute of Physics2010-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/129699Massa, Nestor Emilio; del Campo, Leire; de Sousa Meneses, Domingos; Echegut, Patrick; Fabbris, Gilberto F. L.; et al.; High temperature emissivity, reflectivity, and x-ray absorption of BiFeO3; American Institute of Physics; Journal of Applied Physics; 108; 8; 5-2010; 84114-841220021-8979CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1063/1.3486515info:eu-repo/semantics/altIdentifier/url/https://aip.scitation.org/doi/10.1063/1.3486515info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:08:44Zoai:ri.conicet.gov.ar:11336/129699instacron: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 10:08:46.419CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv High temperature emissivity, reflectivity, and x-ray absorption of BiFeO3
title High temperature emissivity, reflectivity, and x-ray absorption of BiFeO3
spellingShingle High temperature emissivity, reflectivity, and x-ray absorption of BiFeO3
Massa, Nestor Emilio
BiFeO3
MULTIFERROIC
FAR INFRARED EMISSIVITY
FAR INFRARED REFLECTIVITY
title_short High temperature emissivity, reflectivity, and x-ray absorption of BiFeO3
title_full High temperature emissivity, reflectivity, and x-ray absorption of BiFeO3
title_fullStr High temperature emissivity, reflectivity, and x-ray absorption of BiFeO3
title_full_unstemmed High temperature emissivity, reflectivity, and x-ray absorption of BiFeO3
title_sort High temperature emissivity, reflectivity, and x-ray absorption of BiFeO3
dc.creator.none.fl_str_mv Massa, Nestor Emilio
del Campo, Leire
de Sousa Meneses, Domingos
Echegut, Patrick
Fabbris, Gilberto F. L.
Azevedo, Gustavo
Martínez Lope, María Jesus
Alonso, José Antonio
author Massa, Nestor Emilio
author_facet Massa, Nestor Emilio
del Campo, Leire
de Sousa Meneses, Domingos
Echegut, Patrick
Fabbris, Gilberto F. L.
Azevedo, Gustavo
Martínez Lope, María Jesus
Alonso, José Antonio
author_role author
author2 del Campo, Leire
de Sousa Meneses, Domingos
Echegut, Patrick
Fabbris, Gilberto F. L.
Azevedo, Gustavo
Martínez Lope, María Jesus
Alonso, José Antonio
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv BiFeO3
MULTIFERROIC
FAR INFRARED EMISSIVITY
FAR INFRARED REFLECTIVITY
topic BiFeO3
MULTIFERROIC
FAR INFRARED EMISSIVITY
FAR INFRARED REFLECTIVITY
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We report on the lattice evolution of BiFeO3 as function of temperature using far infrared emissivity, reflectivity, and x-ray absorption local structure. A power law fit to the lowest frequency soft phonon in the magnetic ordered phase yields an exponent = 0.25 as for a tricritical point. At about 200 K below TN 640 K it ceases softening as consequence of BiFeO3 metastability. We identified this temperature as corresponding to a crossover transition to an order-disorder regime. Above 700 K strong band overlapping, merging, and smearing of modes are consequence of thermal fluctuations and chemical disorder. Vibrational modes show band splits in the ferroelectric phase as emerging from triple degenerated species as from a paraelectric cubic phase above TC 1090 K. Temperature dependent x-ray absorption near edge structure XANES at the Fe K edge shows that lower temperature Fe3+ turns into Fe2+. While this matches the FeO wüstite XANES profile, the Bi LIII-edge downshift suggests a high temperature very complex bond configuration at the distorted A perovskite site. Overall, our local structural measurements reveal high temperature defect-induced irreversible lattice changes, below, and above the ferroelectric transition, in an environment lacking of long-range coherence. We did not find an insulator to metal transition prior to melting.
Fil: Massa, Nestor Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Química Inorgánica "Dr. Pedro J. Aymonino". Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Química Inorgánica "Dr. Pedro J. Aymonino"; Argentina
Fil: del Campo, Leire. Centre National de la Recherche Scientifique; Francia
Fil: de Sousa Meneses, Domingos. Centre National de la Recherche Scientifique; Francia
Fil: Echegut, Patrick. Centre National de la Recherche Scientifique; Francia
Fil: Fabbris, Gilberto F. L.. Universidade Estadual de Campinas; Brasil
Fil: Azevedo, Gustavo. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Martínez Lope, María Jesus. Instituto de Ciencia de Materiales de Madrid; España
Fil: Alonso, José Antonio. Instituto de Ciencia de Materiales de Madrid; España
description We report on the lattice evolution of BiFeO3 as function of temperature using far infrared emissivity, reflectivity, and x-ray absorption local structure. A power law fit to the lowest frequency soft phonon in the magnetic ordered phase yields an exponent = 0.25 as for a tricritical point. At about 200 K below TN 640 K it ceases softening as consequence of BiFeO3 metastability. We identified this temperature as corresponding to a crossover transition to an order-disorder regime. Above 700 K strong band overlapping, merging, and smearing of modes are consequence of thermal fluctuations and chemical disorder. Vibrational modes show band splits in the ferroelectric phase as emerging from triple degenerated species as from a paraelectric cubic phase above TC 1090 K. Temperature dependent x-ray absorption near edge structure XANES at the Fe K edge shows that lower temperature Fe3+ turns into Fe2+. While this matches the FeO wüstite XANES profile, the Bi LIII-edge downshift suggests a high temperature very complex bond configuration at the distorted A perovskite site. Overall, our local structural measurements reveal high temperature defect-induced irreversible lattice changes, below, and above the ferroelectric transition, in an environment lacking of long-range coherence. We did not find an insulator to metal transition prior to melting.
publishDate 2010
dc.date.none.fl_str_mv 2010-05
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/11336/129699
Massa, Nestor Emilio; del Campo, Leire; de Sousa Meneses, Domingos; Echegut, Patrick; Fabbris, Gilberto F. L.; et al.; High temperature emissivity, reflectivity, and x-ray absorption of BiFeO3; American Institute of Physics; Journal of Applied Physics; 108; 8; 5-2010; 84114-84122
0021-8979
CONICET Digital
CONICET
url http://hdl.handle.net/11336/129699
identifier_str_mv Massa, Nestor Emilio; del Campo, Leire; de Sousa Meneses, Domingos; Echegut, Patrick; Fabbris, Gilberto F. L.; et al.; High temperature emissivity, reflectivity, and x-ray absorption of BiFeO3; American Institute of Physics; Journal of Applied Physics; 108; 8; 5-2010; 84114-84122
0021-8979
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1063/1.3486515
info:eu-repo/semantics/altIdentifier/url/https://aip.scitation.org/doi/10.1063/1.3486515
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
dc.publisher.none.fl_str_mv American Institute of Physics
publisher.none.fl_str_mv American Institute of Physics
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
_version_ 1842270056780660736
score 13.13397

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