Positron trapping in BaTiO<SUB>3</SUB> perovskite

Autores
Macchi, Carlos Eugenio; Somoza, A.; Dupasquier, A.; López García, Alberto Raúl; Castro, Miriam Susana
Año de publicación
2001
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Positron lifetime spectra in BaTiO3 single crystals were measured at temperatures up to 873 K, also at room temperature after quenching from temperatures up to 473 K. The explored temperature range includes the ferroelectric to paraelectric phase transition. The material displays an irreversible behaviour when heated, with anomalies around TC. The temperature dependence of the positron lifetime becomes reversible only after annealing above 550 K. The results suggest modifications of the charge state of non-equilibrium vacancies occurring at moderate temperature and microstructural changes taking place at high temperature. The reversible behaviour of the annealed crystal is consistent with thermally activated positron trap formation.
Facultad de Ciencias Exactas
Comisión de Investigaciones Científicas de la provincia de Buenos Aires
Materia
Física
BaTiO3
Ferroelectric
Positron annihilation
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/100937
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/100937
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Positron trapping in BaTiO<SUB>3</SUB> perovskiteMacchi, Carlos EugenioSomoza, A.Dupasquier, A.López García, Alberto RaúlCastro, Miriam SusanaFísicaBaTiO3FerroelectricPositron annihilationPositron lifetime spectra in BaTiO3 single crystals were measured at temperatures up to 873 K, also at room temperature after quenching from temperatures up to 473 K. The explored temperature range includes the ferroelectric to paraelectric phase transition. The material displays an irreversible behaviour when heated, with anomalies around TC. The temperature dependence of the positron lifetime becomes reversible only after annealing above 550 K. The results suggest modifications of the charge state of non-equilibrium vacancies occurring at moderate temperature and microstructural changes taking place at high temperature. The reversible behaviour of the annealed crystal is consistent with thermally activated positron trap formation.Facultad de Ciencias ExactasComisión de Investigaciones Científicas de la provincia de Buenos Aires2001-04-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf5717-5722http://sedici.unlp.edu.ar/handle/10915/100937enginfo:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/36694info:eu-repo/semantics/altIdentifier/issn/0953-8984info:eu-repo/semantics/altIdentifier/doi/10.1088/0953-8984/13/24/316info:eu-repo/semantics/altIdentifier/hdl/11336/36694info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-03T10:53:10Zoai:sedici.unlp.edu.ar:10915/100937Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-03 10:53:10.515SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Positron trapping in BaTiO<SUB>3</SUB> perovskite
title Positron trapping in BaTiO<SUB>3</SUB> perovskite
spellingShingle Positron trapping in BaTiO<SUB>3</SUB> perovskite
Macchi, Carlos Eugenio
Física
BaTiO3
Ferroelectric
Positron annihilation
title_short Positron trapping in BaTiO<SUB>3</SUB> perovskite
title_full Positron trapping in BaTiO<SUB>3</SUB> perovskite
title_fullStr Positron trapping in BaTiO<SUB>3</SUB> perovskite
title_full_unstemmed Positron trapping in BaTiO<SUB>3</SUB> perovskite
title_sort Positron trapping in BaTiO<SUB>3</SUB> perovskite
dc.creator.none.fl_str_mv Macchi, Carlos Eugenio
Somoza, A.
Dupasquier, A.
López García, Alberto Raúl
Castro, Miriam Susana
author Macchi, Carlos Eugenio
author_facet Macchi, Carlos Eugenio
Somoza, A.
Dupasquier, A.
López García, Alberto Raúl
Castro, Miriam Susana
author_role author
author2 Somoza, A.
Dupasquier, A.
López García, Alberto Raúl
Castro, Miriam Susana
author2_role author
author
author
author
dc.subject.none.fl_str_mv Física
BaTiO3
Ferroelectric
Positron annihilation
topic Física
BaTiO3
Ferroelectric
Positron annihilation
dc.description.none.fl_txt_mv Positron lifetime spectra in BaTiO3 single crystals were measured at temperatures up to 873 K, also at room temperature after quenching from temperatures up to 473 K. The explored temperature range includes the ferroelectric to paraelectric phase transition. The material displays an irreversible behaviour when heated, with anomalies around TC. The temperature dependence of the positron lifetime becomes reversible only after annealing above 550 K. The results suggest modifications of the charge state of non-equilibrium vacancies occurring at moderate temperature and microstructural changes taking place at high temperature. The reversible behaviour of the annealed crystal is consistent with thermally activated positron trap formation.
Facultad de Ciencias Exactas
Comisión de Investigaciones Científicas de la provincia de Buenos Aires
description Positron lifetime spectra in BaTiO3 single crystals were measured at temperatures up to 873 K, also at room temperature after quenching from temperatures up to 473 K. The explored temperature range includes the ferroelectric to paraelectric phase transition. The material displays an irreversible behaviour when heated, with anomalies around TC. The temperature dependence of the positron lifetime becomes reversible only after annealing above 550 K. The results suggest modifications of the charge state of non-equilibrium vacancies occurring at moderate temperature and microstructural changes taking place at high temperature. The reversible behaviour of the annealed crystal is consistent with thermally activated positron trap formation.
publishDate 2001
dc.date.none.fl_str_mv 2001-04-11
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/100937
url http://sedici.unlp.edu.ar/handle/10915/100937
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/36694
info:eu-repo/semantics/altIdentifier/issn/0953-8984
info:eu-repo/semantics/altIdentifier/doi/10.1088/0953-8984/13/24/316
info:eu-repo/semantics/altIdentifier/hdl/11336/36694
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
5717-5722
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 13.13397

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