Appearance of room-temperature ferromagnetism in Cu-doped TiO2-δ films

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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...

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Detalles Bibliográficos
Autores principales: Duhalde, Stella Maris, Vignolo, María Florencia, Weissmann, Mariana
Publicado: 2005
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v72_n16_p_Duhalde
http://hdl.handle.net/20.500.12110/paper_10980121_v72_n16_p_Duhalde
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_10980121_v72_n16_p_Duhalde
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spelling paper:paper_10980121_v72_n16_p_Duhalde2023-06-08T16:07:31Z Appearance of room-temperature ferromagnetism in Cu-doped TiO2-δ films Duhalde, Stella Maris Vignolo, María Florencia Weissmann, Mariana 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 1.5μB 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. © 2005 The American Physical Society. Fil:Duhalde, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vignolo, M.F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Weissmann, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2005 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v72_n16_p_Duhalde http://hdl.handle.net/20.500.12110/paper_10980121_v72_n16_p_Duhalde
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
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 1.5μB 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. © 2005 The American Physical Society.
author Duhalde, Stella Maris
Vignolo, María Florencia
Weissmann, Mariana
spellingShingle Duhalde, Stella Maris
Vignolo, María Florencia
Weissmann, Mariana
Appearance of room-temperature ferromagnetism in Cu-doped TiO2-δ films
author_facet Duhalde, Stella Maris
Vignolo, María Florencia
Weissmann, Mariana
author_sort Duhalde, Stella Maris
title Appearance of room-temperature ferromagnetism in Cu-doped TiO2-δ films
title_short Appearance of room-temperature ferromagnetism in Cu-doped TiO2-δ films
title_full Appearance of room-temperature ferromagnetism in Cu-doped TiO2-δ films
title_fullStr Appearance of room-temperature ferromagnetism in Cu-doped TiO2-δ films
title_full_unstemmed Appearance of room-temperature ferromagnetism in Cu-doped TiO2-δ films
title_sort appearance of room-temperature ferromagnetism in cu-doped tio2-δ films
publishDate 2005
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v72_n16_p_Duhalde
http://hdl.handle.net/20.500.12110/paper_10980121_v72_n16_p_Duhalde
work_keys_str_mv AT duhaldestellamaris appearanceofroomtemperatureferromagnetismincudopedtio2dfilms
AT vignolomariaflorencia appearanceofroomtemperatureferromagnetismincudopedtio2dfilms
AT weissmannmariana appearanceofroomtemperatureferromagnetismincudopedtio2dfilms
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