ZnO:Co diluted magnetic semiconductor or hybrid nanostructure for spintronics?

We have studied the influence of intrinsic and extrinsic defects in the magnetic and electrical transport properties of Co-doped ZnO thin films. X-ray absorption measurements show that Co substitute Zn in the ZnO structure and it is in the 2+ oxidation state. Magnetization (M) measurements show that...

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Detalles Bibliográficos
Autores principales: Golmar, Federico, Villafuerte, M., Mudarra Navarro, Azucena Marisol, Rodríguez Torres, Claudia Elena, Barzola Quiquia, José, Esquinazi, Pablo, Heluani, S. P.
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2010
Materias:
Física
Ferromagnetism
ZnO
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/132494
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-132494
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Ferromagnetism
ZnO
spellingShingle Física
Ferromagnetism
ZnO
Golmar, Federico
Villafuerte, M.
Mudarra Navarro, Azucena Marisol
Rodríguez Torres, Claudia Elena
Barzola Quiquia, José
Esquinazi, Pablo
Heluani, S. P.
ZnO:Co diluted magnetic semiconductor or hybrid nanostructure for spintronics?
topic_facet Física
Ferromagnetism
ZnO
description We have studied the influence of intrinsic and extrinsic defects in the magnetic and electrical transport properties of Co-doped ZnO thin films. X-ray absorption measurements show that Co substitute Zn in the ZnO structure and it is in the 2+ oxidation state. Magnetization (M) measurements show that doped samples are mainly paramagnetic. From M vs. H loops measured at 5 K we found that the values of the orbital L and spin S numbers are between 1 and 1.3 for L and S = 3/2, in agreement with the representative values for isolated Co 2+. The obtained negative values of the Curie–Weiss temperatures indicate the existence of antiferromagnetic interactions between transition metal atoms.
format Articulo
Preprint
author Golmar, Federico
Villafuerte, M.
Mudarra Navarro, Azucena Marisol
Rodríguez Torres, Claudia Elena
Barzola Quiquia, José
Esquinazi, Pablo
Heluani, S. P.
author_facet Golmar, Federico
Villafuerte, M.
Mudarra Navarro, Azucena Marisol
Rodríguez Torres, Claudia Elena
Barzola Quiquia, José
Esquinazi, Pablo
Heluani, S. P.
author_sort Golmar, Federico
title ZnO:Co diluted magnetic semiconductor or hybrid nanostructure for spintronics?
title_short ZnO:Co diluted magnetic semiconductor or hybrid nanostructure for spintronics?
title_full ZnO:Co diluted magnetic semiconductor or hybrid nanostructure for spintronics?
title_fullStr ZnO:Co diluted magnetic semiconductor or hybrid nanostructure for spintronics?
title_full_unstemmed ZnO:Co diluted magnetic semiconductor or hybrid nanostructure for spintronics?
title_sort zno:co diluted magnetic semiconductor or hybrid nanostructure for spintronics?
publishDate 2010
url http://sedici.unlp.edu.ar/handle/10915/132494
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