Abstract:
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.
Registro:
Documento: |
Artículo
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Título: | Appearance of room-temperature ferromagnetism in Cu-doped TiO2-δ films |
Autor: | 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. |
Filiación: | Laboratorio de Ablación Láser, Depto. de Física, Universidad de Buenos Aires, Paseo Colón 850, 1063 Buenos Aires, Argentina Laboratorio de Bajas Temperaturas, Facultad de Ciencias Exactas Y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160, 1428 Buenos Aires, Argentina Departamento de Física-Instituto de Física la Plata (CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, C.C. No. 67, 1900 La Plata, Argentina Departamento de Física, Comisión Nacional de Energía Atómica, Av. del Libertador 8250, 1429 Buenos Aires, Argentina
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Año: | 2005
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Volumen: | 72
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Número: | 16
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DOI: |
http://dx.doi.org/10.1103/PhysRevB.72.161313 |
Título revista: | Physical Review B - Condensed Matter and Materials Physics
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Título revista abreviado: | Phys. Rev. B Condens. Matter Mater. Phys.
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ISSN: | 10980121
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CODEN: | PRBMD
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v72_n16_p_Duhalde |
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Citas:
---------- APA ----------
Duhalde, S., Vignolo, M.F., Golmar, F., Chiliotte, C., Torres, C.E.R., Errico, L.A., Cabrera, A.F.,..., Weissmann, M.
(2005)
. Appearance of room-temperature ferromagnetism in Cu-doped TiO2-δ films. Physical Review B - Condensed Matter and Materials Physics, 72(16).
http://dx.doi.org/10.1103/PhysRevB.72.161313---------- CHICAGO ----------
Duhalde, S., Vignolo, M.F., Golmar, F., Chiliotte, C., Torres, C.E.R., Errico, L.A., et al.
"Appearance of room-temperature ferromagnetism in Cu-doped TiO2-δ films"
. Physical Review B - Condensed Matter and Materials Physics 72, no. 16
(2005).
http://dx.doi.org/10.1103/PhysRevB.72.161313---------- MLA ----------
Duhalde, S., Vignolo, M.F., Golmar, F., Chiliotte, C., Torres, C.E.R., Errico, L.A., et al.
"Appearance of room-temperature ferromagnetism in Cu-doped TiO2-δ films"
. Physical Review B - Condensed Matter and Materials Physics, vol. 72, no. 16, 2005.
http://dx.doi.org/10.1103/PhysRevB.72.161313---------- VANCOUVER ----------
Duhalde, S., Vignolo, M.F., Golmar, F., Chiliotte, C., Torres, C.E.R., Errico, L.A., et al. Appearance of room-temperature ferromagnetism in Cu-doped TiO2-δ films. Phys. Rev. B Condens. Matter Mater. Phys. 2005;72(16).
http://dx.doi.org/10.1103/PhysRevB.72.161313