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

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, 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
Formato: Articulo
Lenguaje:Inglés
Publicado: 2005
Materias:
Ciencias Exactas
Física
ferromagnetism
magnetization curves
room-temperature
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/126575
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-126575
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
ferromagnetism
magnetization curves
room-temperature
spellingShingle Ciencias Exactas
Física
ferromagnetism
magnetization curves
room-temperature
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
Appearance of room-temperature ferromagnetism in Cu-doped TiO<sub>2-δ</sub> films
topic_facet Ciencias Exactas
Física
ferromagnetism
magnetization curves
room-temperature
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.
format Articulo
Articulo
author 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_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_sort Duhalde, S.
title Appearance of room-temperature ferromagnetism in Cu-doped TiO<sub>2-δ</sub> films
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
publishDate 2005
url http://sedici.unlp.edu.ar/handle/10915/126575
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