High temperature far-infrared dynamics of orthorhombic NdMnO3: emissivity and reflectivity

Autores
Massa, Nestor Emilio; del Campo, Leire; De Sousa Meneses, Domingos; Echegut, Patrick; Martínez Lope, María Jesús; Alonso, José Antonio
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We report on near normal far- and mid-infrared emission and reflectivity of NdMnO3 perovskite from room temperature to sample decomposition above 1800 K. At 300 K the number of infrared active phonons is in close agreement with the 25 calculated for the orthorhombic D16 2h–Pbnm (Z = 4) space group. Their number gradually decreases as we approach the temperature of orbital disorder at ∼1023 K where the orthorhombic O0 lower temperature cooperative phase coexists with the cubic orthorhombic O. At above ∼1200 K, the three infrared active phonons coincide with that expected for cubic Pm-3m (Z = 1) in the high temperature insulating regime. Heating samples in dry air triggers double exchange conductivity by Mn3+ and Mn4+ ions and a small polaron mid-infrared band. Fits to the optical conductivity single out the octahedral antisymmetric and symmetric vibrational modes as the main phonons in the electron–phonon interactions at 875 K. For 1745 K, it is enough to consider the symmetric stretching internal mode. An overdamped defect induced Drude component is clearly outlined at the highest temperatures. We conclude that rare earth manganite eg electrons are prone to spin, charge, orbital, and lattice couplings in an intrinsic orbital distorted perovskite lattice, favoring embryonic low energy collective excitations.
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. Conditions Extremes et Matériaux Haute Température et Irradiation. Orleans; Francia. Université d’Orléans; Francia
Fil: De Sousa Meneses, Domingos. Conditions Extremes et Matériaux Haute Température et Irradiation. Orleans; Francia. Université d’Orléans; Francia
Fil: Echegut, Patrick. Conditions Extremes et Matériaux Haute Température et Irradiation. Orleans; Francia
Fil: Martínez Lope, María Jesús. Instituto de Ciencia de Materiales de Madrid; España
Fil: Alonso, José Antonio. Instituto de Ciencia de Materiales de Madrid; España
Materia
High Temperature
Emissivity
Manganites
Far Infrared
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:11336/24149
Acceder
id CONICETDig_70b41b4df53678767b34dcd0668285f3
oai_identifier_str oai:ri.conicet.gov.ar:11336/24149
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling High temperature far-infrared dynamics of orthorhombic NdMnO3: emissivity and reflectivityMassa, Nestor Emiliodel Campo, LeireDe Sousa Meneses, DomingosEchegut, PatrickMartínez Lope, María JesúsAlonso, José AntonioHigh TemperatureEmissivityManganitesFar Infraredhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We report on near normal far- and mid-infrared emission and reflectivity of NdMnO3 perovskite from room temperature to sample decomposition above 1800 K. At 300 K the number of infrared active phonons is in close agreement with the 25 calculated for the orthorhombic D16 2h–Pbnm (Z = 4) space group. Their number gradually decreases as we approach the temperature of orbital disorder at ∼1023 K where the orthorhombic O0 lower temperature cooperative phase coexists with the cubic orthorhombic O. At above ∼1200 K, the three infrared active phonons coincide with that expected for cubic Pm-3m (Z = 1) in the high temperature insulating regime. Heating samples in dry air triggers double exchange conductivity by Mn3+ and Mn4+ ions and a small polaron mid-infrared band. Fits to the optical conductivity single out the octahedral antisymmetric and symmetric vibrational modes as the main phonons in the electron–phonon interactions at 875 K. For 1745 K, it is enough to consider the symmetric stretching internal mode. An overdamped defect induced Drude component is clearly outlined at the highest temperatures. We conclude that rare earth manganite eg electrons are prone to spin, charge, orbital, and lattice couplings in an intrinsic orbital distorted perovskite lattice, favoring embryonic low energy collective excitations.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. Conditions Extremes et Matériaux Haute Température et Irradiation. Orleans; Francia. Université d’Orléans; FranciaFil: De Sousa Meneses, Domingos. Conditions Extremes et Matériaux Haute Température et Irradiation. Orleans; Francia. Université d’Orléans; FranciaFil: Echegut, Patrick. Conditions Extremes et Matériaux Haute Température et Irradiation. Orleans; FranciaFil: Martínez Lope, María Jesús. Instituto de Ciencia de Materiales de Madrid; EspañaFil: Alonso, José Antonio. Instituto de Ciencia de Materiales de Madrid; EspañaIOP Publishing2013-05-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/24149Massa, Nestor Emilio; del Campo, Leire; De Sousa Meneses, Domingos; Echegut, Patrick; Martínez Lope, María Jesús; et al.; High temperature far-infrared dynamics of orthorhombic NdMnO3: emissivity and reflectivity; IOP Publishing; Journal of Physics: Condensed Matter; 25; 23; 16-5-2013; 235603-2356110953-8984CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1088/0953-8984/25/23/235603info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/0953-8984/25/23/235603/meta;info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T12:00:49Zoai:ri.conicet.gov.ar:11336/24149instacron: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:34982025-10-22 12:00:49.967CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv High temperature far-infrared dynamics of orthorhombic NdMnO3: emissivity and reflectivity
title High temperature far-infrared dynamics of orthorhombic NdMnO3: emissivity and reflectivity
spellingShingle High temperature far-infrared dynamics of orthorhombic NdMnO3: emissivity and reflectivity
Massa, Nestor Emilio
High Temperature
Emissivity
Manganites
Far Infrared
title_short High temperature far-infrared dynamics of orthorhombic NdMnO3: emissivity and reflectivity
title_full High temperature far-infrared dynamics of orthorhombic NdMnO3: emissivity and reflectivity
title_fullStr High temperature far-infrared dynamics of orthorhombic NdMnO3: emissivity and reflectivity
title_full_unstemmed High temperature far-infrared dynamics of orthorhombic NdMnO3: emissivity and reflectivity
title_sort High temperature far-infrared dynamics of orthorhombic NdMnO3: emissivity and reflectivity
dc.creator.none.fl_str_mv Massa, Nestor Emilio
del Campo, Leire
De Sousa Meneses, Domingos
Echegut, Patrick
Martínez Lope, María Jesús
Alonso, José Antonio
author Massa, Nestor Emilio
author_facet Massa, Nestor Emilio
del Campo, Leire
De Sousa Meneses, Domingos
Echegut, Patrick
Martínez Lope, María Jesús
Alonso, José Antonio
author_role author
author2 del Campo, Leire
De Sousa Meneses, Domingos
Echegut, Patrick
Martínez Lope, María Jesús
Alonso, José Antonio
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv High Temperature
Emissivity
Manganites
Far Infrared
topic High Temperature
Emissivity
Manganites
Far Infrared
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 near normal far- and mid-infrared emission and reflectivity of NdMnO3 perovskite from room temperature to sample decomposition above 1800 K. At 300 K the number of infrared active phonons is in close agreement with the 25 calculated for the orthorhombic D16 2h–Pbnm (Z = 4) space group. Their number gradually decreases as we approach the temperature of orbital disorder at ∼1023 K where the orthorhombic O0 lower temperature cooperative phase coexists with the cubic orthorhombic O. At above ∼1200 K, the three infrared active phonons coincide with that expected for cubic Pm-3m (Z = 1) in the high temperature insulating regime. Heating samples in dry air triggers double exchange conductivity by Mn3+ and Mn4+ ions and a small polaron mid-infrared band. Fits to the optical conductivity single out the octahedral antisymmetric and symmetric vibrational modes as the main phonons in the electron–phonon interactions at 875 K. For 1745 K, it is enough to consider the symmetric stretching internal mode. An overdamped defect induced Drude component is clearly outlined at the highest temperatures. We conclude that rare earth manganite eg electrons are prone to spin, charge, orbital, and lattice couplings in an intrinsic orbital distorted perovskite lattice, favoring embryonic low energy collective excitations.
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. Conditions Extremes et Matériaux Haute Température et Irradiation. Orleans; Francia. Université d’Orléans; Francia
Fil: De Sousa Meneses, Domingos. Conditions Extremes et Matériaux Haute Température et Irradiation. Orleans; Francia. Université d’Orléans; Francia
Fil: Echegut, Patrick. Conditions Extremes et Matériaux Haute Température et Irradiation. Orleans; Francia
Fil: Martínez Lope, María Jesús. Instituto de Ciencia de Materiales de Madrid; España
Fil: Alonso, José Antonio. Instituto de Ciencia de Materiales de Madrid; España
description We report on near normal far- and mid-infrared emission and reflectivity of NdMnO3 perovskite from room temperature to sample decomposition above 1800 K. At 300 K the number of infrared active phonons is in close agreement with the 25 calculated for the orthorhombic D16 2h–Pbnm (Z = 4) space group. Their number gradually decreases as we approach the temperature of orbital disorder at ∼1023 K where the orthorhombic O0 lower temperature cooperative phase coexists with the cubic orthorhombic O. At above ∼1200 K, the three infrared active phonons coincide with that expected for cubic Pm-3m (Z = 1) in the high temperature insulating regime. Heating samples in dry air triggers double exchange conductivity by Mn3+ and Mn4+ ions and a small polaron mid-infrared band. Fits to the optical conductivity single out the octahedral antisymmetric and symmetric vibrational modes as the main phonons in the electron–phonon interactions at 875 K. For 1745 K, it is enough to consider the symmetric stretching internal mode. An overdamped defect induced Drude component is clearly outlined at the highest temperatures. We conclude that rare earth manganite eg electrons are prone to spin, charge, orbital, and lattice couplings in an intrinsic orbital distorted perovskite lattice, favoring embryonic low energy collective excitations.
publishDate 2013
dc.date.none.fl_str_mv 2013-05-16
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/11336/24149
Massa, Nestor Emilio; del Campo, Leire; De Sousa Meneses, Domingos; Echegut, Patrick; Martínez Lope, María Jesús; et al.; High temperature far-infrared dynamics of orthorhombic NdMnO3: emissivity and reflectivity; IOP Publishing; Journal of Physics: Condensed Matter; 25; 23; 16-5-2013; 235603-235611
0953-8984
CONICET Digital
CONICET
url http://hdl.handle.net/11336/24149
identifier_str_mv Massa, Nestor Emilio; del Campo, Leire; De Sousa Meneses, Domingos; Echegut, Patrick; Martínez Lope, María Jesús; et al.; High temperature far-infrared dynamics of orthorhombic NdMnO3: emissivity and reflectivity; IOP Publishing; Journal of Physics: Condensed Matter; 25; 23; 16-5-2013; 235603-235611
0953-8984
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1088/0953-8984/25/23/235603
info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/0953-8984/25/23/235603/meta;
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 IOP Publishing
publisher.none.fl_str_mv IOP Publishing
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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score 12.982451

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