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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Autores principales: | , , , , , , |
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Formato: | Articulo Preprint |
Lenguaje: | Inglés |
Publicado: |
2010
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Materias: | |
Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/132494 |
Aporte de: |
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I19-R120-10915-132494 |
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institution |
Universidad Nacional de La Plata |
institution_str |
I-19 |
repository_str |
R-120 |
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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 |
work_keys_str_mv |
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bdutipo_str |
Repositorios |
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1764820453988237312 |