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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Autores principales: Duhalde, S., Vignolo, M.F., Golmar, F., Chiliotte, C., Torres, C.E.R., Errico, L.A., Cabrera, A.F., Rentería, M., Sánchez, F.H., Weissmann, M.
Formato: JOUR
Acceso en línea: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 todo:paper_10980121_v72_n16_p_Duhalde
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spelling todo:paper_10980121_v72_n16_p_Duhalde2023-10-03T16:05:56Z Appearance of room-temperature ferromagnetism in Cu-doped TiO2-δ films Duhalde, S. Vignolo, M.F. Golmar, F. Chiliotte, C. Torres, C.E.R. Errico, L.A. Cabrera, A.F. Rentería, M. Sánchez, F.H. Weissmann, M. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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.
format JOUR
author Duhalde, S.
Vignolo, M.F.
Golmar, F.
Chiliotte, C.
Torres, C.E.R.
Errico, L.A.
Cabrera, A.F.
Rentería, M.
Sánchez, F.H.
Weissmann, M.
spellingShingle Duhalde, S.
Vignolo, M.F.
Golmar, F.
Chiliotte, C.
Torres, C.E.R.
Errico, L.A.
Cabrera, A.F.
Rentería, M.
Sánchez, F.H.
Weissmann, M.
Appearance of room-temperature ferromagnetism in Cu-doped TiO2-δ films
author_facet Duhalde, S.
Vignolo, M.F.
Golmar, F.
Chiliotte, C.
Torres, C.E.R.
Errico, L.A.
Cabrera, A.F.
Rentería, M.
Sánchez, F.H.
Weissmann, M.
author_sort Duhalde, S.
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
url http://hdl.handle.net/20.500.12110/paper_10980121_v72_n16_p_Duhalde
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