Magnetoresistance, temporal evolution, and relaxation of the electrical resistivity in the re-entrant semiconducting La0.80Ba0.20CoO3 perovskite

Autores
Sanchez, Rodolfo Daniel; Mira, J.; Rivas, J.; Breijo, M. P.; Señarís Rodríguez, M. A.
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We report here a study on the electrical and magnetic properties of La1-xBaxCoO3 in the re-entrant semiconducting region (x = 0.20). We find that in this material: (i) the insulator-metal-insulator sequence is unstable and evolves toward a purely semiconducting behavior; the initial ρ versus T curve can be reinstated upon appropriate annealing treatments; (ii) there are relaxation effects that can be seen by changing the polarity of the electrodes; (iii) there is a negative magnetoresistance Δρ/ρ approx. 2-3%, for a field as low as 9 kOe, especially at the metal-insulating transition temperatures; and (iv) there are important fluctuations in the electrical resistivity. Taking into account these experimental observations, we can interpret this material as an inhomogeneous system where two thermodynamic phases, one semiconducting and the other metallic and ferromagnetic, coexist, although they are crystallographically indistinguishable.
Fil: Sanchez, Rodolfo Daniel. Universidad de Santiago de Compostela. Facultad de Física; España. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Mira, J.. Universidad de Santiago de Compostela. Facultad de Física; España
Fil: Rivas, J.. Universidad de Santiago de Compostela. Facultad de Física; España
Fil: Breijo, M. P.. Departamento de Química Fundamental E Industrial; España
Fil: Señarís Rodríguez, M. A.. Departamento de Química Fundamental E Industrial; España
Materia
La0.80ba0.20coo3
Magnetoresistance
Electrical Properties
Magnetism
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:11336/68586
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/68586
network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Magnetoresistance, temporal evolution, and relaxation of the electrical resistivity in the re-entrant semiconducting La0.80Ba0.20CoO3 perovskiteSanchez, Rodolfo DanielMira, J.Rivas, J.Breijo, M. P.Señarís Rodríguez, M. A.La0.80ba0.20coo3MagnetoresistanceElectrical PropertiesMagnetismhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We report here a study on the electrical and magnetic properties of La1-xBaxCoO3 in the re-entrant semiconducting region (x = 0.20). We find that in this material: (i) the insulator-metal-insulator sequence is unstable and evolves toward a purely semiconducting behavior; the initial ρ versus T curve can be reinstated upon appropriate annealing treatments; (ii) there are relaxation effects that can be seen by changing the polarity of the electrodes; (iii) there is a negative magnetoresistance Δρ/ρ approx. 2-3%, for a field as low as 9 kOe, especially at the metal-insulating transition temperatures; and (iv) there are important fluctuations in the electrical resistivity. Taking into account these experimental observations, we can interpret this material as an inhomogeneous system where two thermodynamic phases, one semiconducting and the other metallic and ferromagnetic, coexist, although they are crystallographically indistinguishable.Fil: Sanchez, Rodolfo Daniel. Universidad de Santiago de Compostela. Facultad de Física; España. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Mira, J.. Universidad de Santiago de Compostela. Facultad de Física; EspañaFil: Rivas, J.. Universidad de Santiago de Compostela. Facultad de Física; EspañaFil: Breijo, M. P.. Departamento de Química Fundamental E Industrial; EspañaFil: Señarís Rodríguez, M. A.. Departamento de Química Fundamental E Industrial; EspañaMaterials Research Society2011-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/68586Sanchez, Rodolfo Daniel; Mira, J.; Rivas, J.; Breijo, M. P.; Señarís Rodríguez, M. A.; Magnetoresistance, temporal evolution, and relaxation of the electrical resistivity in the re-entrant semiconducting La0.80Ba0.20CoO3 perovskite; Materials Research Society; Journal Of Materials Research; 14; 6; 1-2011; 2533-25390884-2914CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/journal-of-materials-research/article/magnetoresistance-temporal-evolution-and-relaxation-of-the-electrical-resistivity-in-the-reentrant-semiconducting-la080ba020coo3-perovskite/92690586442AF479251486712081FD19info:eu-repo/semantics/altIdentifier/doi/10.1557/JMR.1999.0339info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:58:46Zoai:ri.conicet.gov.ar:11336/68586instacron: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 11:58:46.414CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Magnetoresistance, temporal evolution, and relaxation of the electrical resistivity in the re-entrant semiconducting La0.80Ba0.20CoO3 perovskite
title Magnetoresistance, temporal evolution, and relaxation of the electrical resistivity in the re-entrant semiconducting La0.80Ba0.20CoO3 perovskite
spellingShingle Magnetoresistance, temporal evolution, and relaxation of the electrical resistivity in the re-entrant semiconducting La0.80Ba0.20CoO3 perovskite
Sanchez, Rodolfo Daniel
La0.80ba0.20coo3
Magnetoresistance
Electrical Properties
Magnetism
title_short Magnetoresistance, temporal evolution, and relaxation of the electrical resistivity in the re-entrant semiconducting La0.80Ba0.20CoO3 perovskite
title_full Magnetoresistance, temporal evolution, and relaxation of the electrical resistivity in the re-entrant semiconducting La0.80Ba0.20CoO3 perovskite
title_fullStr Magnetoresistance, temporal evolution, and relaxation of the electrical resistivity in the re-entrant semiconducting La0.80Ba0.20CoO3 perovskite
title_full_unstemmed Magnetoresistance, temporal evolution, and relaxation of the electrical resistivity in the re-entrant semiconducting La0.80Ba0.20CoO3 perovskite
title_sort Magnetoresistance, temporal evolution, and relaxation of the electrical resistivity in the re-entrant semiconducting La0.80Ba0.20CoO3 perovskite
dc.creator.none.fl_str_mv Sanchez, Rodolfo Daniel
Mira, J.
Rivas, J.
Breijo, M. P.
Señarís Rodríguez, M. A.
author Sanchez, Rodolfo Daniel
author_facet Sanchez, Rodolfo Daniel
Mira, J.
Rivas, J.
Breijo, M. P.
Señarís Rodríguez, M. A.
author_role author
author2 Mira, J.
Rivas, J.
Breijo, M. P.
Señarís Rodríguez, M. A.
author2_role author
author
author
author
dc.subject.none.fl_str_mv La0.80ba0.20coo3
Magnetoresistance
Electrical Properties
Magnetism
topic La0.80ba0.20coo3
Magnetoresistance
Electrical Properties
Magnetism
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 here a study on the electrical and magnetic properties of La1-xBaxCoO3 in the re-entrant semiconducting region (x = 0.20). We find that in this material: (i) the insulator-metal-insulator sequence is unstable and evolves toward a purely semiconducting behavior; the initial ρ versus T curve can be reinstated upon appropriate annealing treatments; (ii) there are relaxation effects that can be seen by changing the polarity of the electrodes; (iii) there is a negative magnetoresistance Δρ/ρ approx. 2-3%, for a field as low as 9 kOe, especially at the metal-insulating transition temperatures; and (iv) there are important fluctuations in the electrical resistivity. Taking into account these experimental observations, we can interpret this material as an inhomogeneous system where two thermodynamic phases, one semiconducting and the other metallic and ferromagnetic, coexist, although they are crystallographically indistinguishable.
Fil: Sanchez, Rodolfo Daniel. Universidad de Santiago de Compostela. Facultad de Física; España. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Mira, J.. Universidad de Santiago de Compostela. Facultad de Física; España
Fil: Rivas, J.. Universidad de Santiago de Compostela. Facultad de Física; España
Fil: Breijo, M. P.. Departamento de Química Fundamental E Industrial; España
Fil: Señarís Rodríguez, M. A.. Departamento de Química Fundamental E Industrial; España
description We report here a study on the electrical and magnetic properties of La1-xBaxCoO3 in the re-entrant semiconducting region (x = 0.20). We find that in this material: (i) the insulator-metal-insulator sequence is unstable and evolves toward a purely semiconducting behavior; the initial ρ versus T curve can be reinstated upon appropriate annealing treatments; (ii) there are relaxation effects that can be seen by changing the polarity of the electrodes; (iii) there is a negative magnetoresistance Δρ/ρ approx. 2-3%, for a field as low as 9 kOe, especially at the metal-insulating transition temperatures; and (iv) there are important fluctuations in the electrical resistivity. Taking into account these experimental observations, we can interpret this material as an inhomogeneous system where two thermodynamic phases, one semiconducting and the other metallic and ferromagnetic, coexist, although they are crystallographically indistinguishable.
publishDate 2011
dc.date.none.fl_str_mv 2011-01
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/11336/68586
Sanchez, Rodolfo Daniel; Mira, J.; Rivas, J.; Breijo, M. P.; Señarís Rodríguez, M. A.; Magnetoresistance, temporal evolution, and relaxation of the electrical resistivity in the re-entrant semiconducting La0.80Ba0.20CoO3 perovskite; Materials Research Society; Journal Of Materials Research; 14; 6; 1-2011; 2533-2539
0884-2914
CONICET Digital
CONICET
url http://hdl.handle.net/11336/68586
identifier_str_mv Sanchez, Rodolfo Daniel; Mira, J.; Rivas, J.; Breijo, M. P.; Señarís Rodríguez, M. A.; Magnetoresistance, temporal evolution, and relaxation of the electrical resistivity in the re-entrant semiconducting La0.80Ba0.20CoO3 perovskite; Materials Research Society; Journal Of Materials Research; 14; 6; 1-2011; 2533-2539
0884-2914
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/journal-of-materials-research/article/magnetoresistance-temporal-evolution-and-relaxation-of-the-electrical-resistivity-in-the-reentrant-semiconducting-la080ba020coo3-perovskite/92690586442AF479251486712081FD19
info:eu-repo/semantics/altIdentifier/doi/10.1557/JMR.1999.0339
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 Materials Research Society
publisher.none.fl_str_mv Materials Research Society
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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