Appearance of room-temperature ferromagnetism in Cu-doped TiO<sub>2-δ</sub> films

Autores
Duhalde, S.; Vignolo, M. F.; Golmar, Federico; Chiliotte, C.; Rodríguez Torres, Claudia Elena; Errico, Leonardo Antonio; Cabrera, Alejandra Fabiana; Rentería, Mario; Sánchez, Francisco Homero; Weissmann, Mariana
Año de publicación
2005
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We report here the unexpected observation of significant room-temperature ferromagnetism in a semiconductor doped with nonmagnetic impurities, Cu-doped TiO₂ thin films grown by pulsed laser deposition. The magnetic moment, calculated from the magnetization curves, resulted surprisingly large, about 1.5 μB per Cu atom. A large magnetic moment was also obtained from ab initio calculations, but only if an oxygen vacancy in the nearest-neighbor shell of Cu was present. This result suggests that the role of oxygen vacancies is crucial for the appearance of ferromagnetism. The calculations also predict that Cu doping favors the formation of oxygen vacancies.
Facultad de Ciencias Exactas
Instituto de Física La Plata
Materia
Ciencias Exactas
Física
ferromagnetism
magnetization curves
room-temperature
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:10915/126575
Acceder
id SEDICI_be89c4915968483abcc7d95bbddb9aaf
oai_identifier_str oai:sedici.unlp.edu.ar:10915/126575
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Appearance of room-temperature ferromagnetism in Cu-doped TiO<sub>2-δ</sub> filmsDuhalde, S.Vignolo, M. F.Golmar, FedericoChiliotte, C.Rodríguez Torres, Claudia ElenaErrico, Leonardo AntonioCabrera, Alejandra FabianaRentería, MarioSánchez, Francisco HomeroWeissmann, MarianaCiencias ExactasFísicaferromagnetismmagnetization curvesroom-temperatureWe report here the unexpected observation of significant room-temperature ferromagnetism in a semiconductor doped with nonmagnetic impurities, Cu-doped TiO₂ thin films grown by pulsed laser deposition. The magnetic moment, calculated from the magnetization curves, resulted surprisingly large, about 1.5 μ<sub>B</sub> per Cu atom. A large magnetic moment was also obtained from <i>ab initio</i> calculations, but only if an oxygen vacancy in the nearest-neighbor shell of Cu was present. This result suggests that the role of oxygen vacancies is crucial for the appearance of ferromagnetism. The calculations also predict that Cu doping favors the formation of oxygen vacancies.Facultad de Ciencias ExactasInstituto de Física La Plata2005-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/126575enginfo:eu-repo/semantics/altIdentifier/issn/1098-0121info:eu-repo/semantics/altIdentifier/issn/1550-235Xinfo:eu-repo/semantics/altIdentifier/arxiv/cond-mat/0505602info:eu-repo/semantics/altIdentifier/doi/10.1103/physrevb.72.161313info: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:UNLP2025-10-22T17:11:15Zoai:sedici.unlp.edu.ar:10915/126575Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 17:11:16.175SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Appearance of room-temperature ferromagnetism in Cu-doped TiO<sub>2-δ</sub> films
title Appearance of room-temperature ferromagnetism in Cu-doped TiO<sub>2-δ</sub> films
spellingShingle Appearance of room-temperature ferromagnetism in Cu-doped TiO<sub>2-δ</sub> films
Duhalde, S.
Ciencias Exactas
Física
ferromagnetism
magnetization curves
room-temperature
title_short Appearance of room-temperature ferromagnetism in Cu-doped TiO<sub>2-δ</sub> films
title_full Appearance of room-temperature ferromagnetism in Cu-doped TiO<sub>2-δ</sub> films
title_fullStr Appearance of room-temperature ferromagnetism in Cu-doped TiO<sub>2-δ</sub> films
title_full_unstemmed Appearance of room-temperature ferromagnetism in Cu-doped TiO<sub>2-δ</sub> films
title_sort Appearance of room-temperature ferromagnetism in Cu-doped TiO<sub>2-δ</sub> films
dc.creator.none.fl_str_mv Duhalde, S.
Vignolo, M. F.
Golmar, Federico
Chiliotte, C.
Rodríguez Torres, Claudia Elena
Errico, Leonardo Antonio
Cabrera, Alejandra Fabiana
Rentería, Mario
Sánchez, Francisco Homero
Weissmann, Mariana
author Duhalde, S.
author_facet Duhalde, S.
Vignolo, M. F.
Golmar, Federico
Chiliotte, C.
Rodríguez Torres, Claudia Elena
Errico, Leonardo Antonio
Cabrera, Alejandra Fabiana
Rentería, Mario
Sánchez, Francisco Homero
Weissmann, Mariana
author_role author
author2 Vignolo, M. F.
Golmar, Federico
Chiliotte, C.
Rodríguez Torres, Claudia Elena
Errico, Leonardo Antonio
Cabrera, Alejandra Fabiana
Rentería, Mario
Sánchez, Francisco Homero
Weissmann, Mariana
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Física
ferromagnetism
magnetization curves
room-temperature
topic Ciencias Exactas
Física
ferromagnetism
magnetization curves
room-temperature
dc.description.none.fl_txt_mv We report here the unexpected observation of significant room-temperature ferromagnetism in a semiconductor doped with nonmagnetic impurities, Cu-doped TiO₂ thin films grown by pulsed laser deposition. The magnetic moment, calculated from the magnetization curves, resulted surprisingly large, about 1.5 μ<sub>B</sub> per Cu atom. A large magnetic moment was also obtained from <i>ab initio</i> calculations, but only if an oxygen vacancy in the nearest-neighbor shell of Cu was present. This result suggests that the role of oxygen vacancies is crucial for the appearance of ferromagnetism. The calculations also predict that Cu doping favors the formation of oxygen vacancies.
Facultad de Ciencias Exactas
Instituto de Física La Plata
description We report here the unexpected observation of significant room-temperature ferromagnetism in a semiconductor doped with nonmagnetic impurities, Cu-doped TiO₂ thin films grown by pulsed laser deposition. The magnetic moment, calculated from the magnetization curves, resulted surprisingly large, about 1.5 μ<sub>B</sub> per Cu atom. A large magnetic moment was also obtained from <i>ab initio</i> calculations, but only if an oxygen vacancy in the nearest-neighbor shell of Cu was present. This result suggests that the role of oxygen vacancies is crucial for the appearance of ferromagnetism. The calculations also predict that Cu doping favors the formation of oxygen vacancies.
publishDate 2005
dc.date.none.fl_str_mv 2005-10
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/10915/126575
url http://sedici.unlp.edu.ar/handle/10915/126575
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1098-0121
info:eu-repo/semantics/altIdentifier/issn/1550-235X
info:eu-repo/semantics/altIdentifier/arxiv/cond-mat/0505602
info:eu-repo/semantics/altIdentifier/doi/10.1103/physrevb.72.161313
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
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 12.982451

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