Study of the relation between oxygen vacancies and ferromagnetism in Fe-doped TiO2 nano-powders

In this work, we present an experimental and theoretical study of structural and magnetic properties of Fe doped rutile TiO2 nanopowders. We show that Fe-doping induces the formation of oxygen vacancies in the first-sphere coordination of iron ions, which are in +2 and +3 oxidation states. We found...

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Detalles Bibliográficos
Autores: Mudarra Navarro, Azucena Marisol, RodrÍguez Torres, Claudia Elena, Bilovol, Vitaliy, Cabrera, Alejandra Fabiana, Errico, Leonardo Antonio, Weissmann, Mariana Dorotea
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2014
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/100433
Acceso en línea:http://hdl.handle.net/11336/100433
Access Level:acceso abierto
Palabra clave:Magnetic oxides
Mossbauer spectroscopy
Ab-initio
Deffects
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
id AR_ef43ea68e6cddb3f6ce850df7ea4058e
oai_identifier_str oai:ri.conicet.gov.ar:11336/100433
network_acronym_str AR
network_name_str Argentina
repository_id_str
dc.title.none.fl_str_mv Study of the relation between oxygen vacancies and ferromagnetism in Fe-doped TiO2 nano-powders
title Study of the relation between oxygen vacancies and ferromagnetism in Fe-doped TiO2 nano-powders
spellingShingle Study of the relation between oxygen vacancies and ferromagnetism in Fe-doped TiO2 nano-powders
Mudarra Navarro, Azucena Marisol
Magnetic oxides
Mossbauer spectroscopy
Ab-initio
Deffects
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
title_short Study of the relation between oxygen vacancies and ferromagnetism in Fe-doped TiO2 nano-powders
title_full Study of the relation between oxygen vacancies and ferromagnetism in Fe-doped TiO2 nano-powders
title_fullStr Study of the relation between oxygen vacancies and ferromagnetism in Fe-doped TiO2 nano-powders
title_full_unstemmed Study of the relation between oxygen vacancies and ferromagnetism in Fe-doped TiO2 nano-powders
title_sort Study of the relation between oxygen vacancies and ferromagnetism in Fe-doped TiO2 nano-powders
dc.creator.none.fl_str_mv Mudarra Navarro, Azucena Marisol
RodrÍguez Torres, Claudia Elena
Bilovol, Vitaliy
Cabrera, Alejandra Fabiana
Errico, Leonardo Antonio
Weissmann, Mariana Dorotea
author Mudarra Navarro, Azucena Marisol
author_facet Mudarra Navarro, Azucena Marisol
RodrÍguez Torres, Claudia Elena
Bilovol, Vitaliy
Cabrera, Alejandra Fabiana
Errico, Leonardo Antonio
Weissmann, Mariana Dorotea
author_role author
author2 RodrÍguez Torres, Claudia Elena
Bilovol, Vitaliy
Cabrera, Alejandra Fabiana
Errico, Leonardo Antonio
Weissmann, Mariana Dorotea
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Magnetic oxides
Mossbauer spectroscopy
Ab-initio
Deffects
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
topic Magnetic oxides
Mossbauer spectroscopy
Ab-initio
Deffects
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
description In this work, we present an experimental and theoretical study of structural and magnetic properties of Fe doped rutile TiO2 nanopowders. We show that Fe-doping induces the formation of oxygen vacancies in the first-sphere coordination of iron ions, which are in +2 and +3 oxidation states. We found that Fe ions form dimers that share one oxygen vacancy in the case of Fe3+ and two oxygen vacancies in the case of Fe2+. The saturation magnetization is almost independent of iron concentration and slightly increases with the relative fraction of Fe2+. Ab initio calculations show that two Fe ions sharing an oxygen vacancy are coupled ferromagnetically, forming a bound magnetic polaron (BMP), but two neighbor BMPs are aligned antiparallel to each other. Extra electron doping plays a fundamental role mediating the magnetic coupling between the ferromagnetic entities: carriers, possibly concentrated at grain boundaries, mediate between the BMP to produce ferromagnetic alignment.
publishDate 2014
dc.date.none.fl_str_mv 2014-06
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/11336/100433
Mudarra Navarro, Azucena Marisol; RodrÍguez Torres, Claudia Elena; Bilovol, Vitaliy; Cabrera, Alejandra Fabiana; Errico, Leonardo Antonio; et al.; Study of the relation between oxygen vacancies and ferromagnetism in Fe-doped TiO2 nano-powders; American Institute of Physics; Journal of Applied Physics; 115; 22; 6-2014; 1-9
0021-8979
CONICET Digital
CONICET
url http://hdl.handle.net/11336/100433
identifier_str_mv Mudarra Navarro, Azucena Marisol; RodrÍguez Torres, Claudia Elena; Bilovol, Vitaliy; Cabrera, Alejandra Fabiana; Errico, Leonardo Antonio; et al.; Study of the relation between oxygen vacancies and ferromagnetism in Fe-doped TiO2 nano-powders; American Institute of Physics; Journal of Applied Physics; 115; 22; 6-2014; 1-9
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/url/http://scitation.aip.org/content/aip/journal/jap/115/22/10.1063/1.4883183
info:eu-repo/semantics/altIdentifier/doi/10.1063/1.4883183
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
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
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
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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spelling Study of the relation between oxygen vacancies and ferromagnetism in Fe-doped TiO2 nano-powdersMudarra Navarro, Azucena MarisolRodrÍguez Torres, Claudia ElenaBilovol, VitaliyCabrera, Alejandra FabianaErrico, Leonardo AntonioWeissmann, Mariana DoroteaMagnetic oxidesMossbauer spectroscopyAb-initioDeffectshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1In this work, we present an experimental and theoretical study of structural and magnetic properties of Fe doped rutile TiO2 nanopowders. We show that Fe-doping induces the formation of oxygen vacancies in the first-sphere coordination of iron ions, which are in +2 and +3 oxidation states. We found that Fe ions form dimers that share one oxygen vacancy in the case of Fe3+ and two oxygen vacancies in the case of Fe2+. The saturation magnetization is almost independent of iron concentration and slightly increases with the relative fraction of Fe2+. Ab initio calculations show that two Fe ions sharing an oxygen vacancy are coupled ferromagnetically, forming a bound magnetic polaron (BMP), but two neighbor BMPs are aligned antiparallel to each other. Extra electron doping plays a fundamental role mediating the magnetic coupling between the ferromagnetic entities: carriers, possibly concentrated at grain boundaries, mediate between the BMP to produce ferromagnetic alignment.Fil: Mudarra Navarro, Azucena Marisol. 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: RodrÍguez Torres, Claudia Elena. 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: Bilovol, Vitaliy. Universidad de Buenos Aires. Facultad de Ingeniería. Departamento de Física. Laboratorio de Sólidos Amorfos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Cabrera, Alejandra Fabiana. 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: Errico, Leonardo Antonio. 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. Universidad Nacional del Noroeste de la Provincia de Buenos Aires; ArgentinaFil: Weissmann, Mariana Dorotea. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaAmerican Institute of Physics2014-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/100433Mudarra Navarro, Azucena Marisol; RodrÍguez Torres, Claudia Elena; Bilovol, Vitaliy; Cabrera, Alejandra Fabiana; Errico, Leonardo Antonio; et al.; Study of the relation between oxygen vacancies and ferromagnetism in Fe-doped TiO2 nano-powders; American Institute of Physics; Journal of Applied Physics; 115; 22; 6-2014; 1-90021-8979CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://scitation.aip.org/content/aip/journal/jap/115/22/10.1063/1.4883183info:eu-repo/semantics/altIdentifier/doi/10.1063/1.4883183info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T14:00:17Zoai:ri.conicet.gov.ar:11336/100433instacron: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:34982024-05-08 14:00:18.272CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
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