The effect of oxygen plasma exposure on the magnetoelectrical properties of (Ga,Mn)As films is investigated. A significant increase in the oxygen content of the plasma-treated (Ga,Mn)As is visible in depth-profile x-ray photoelectron spectroscopy. The temperature dependence of the electrical resistance shows that after oxygenation the (Ga,Mn)As films become more resistive and that the distinct peak accounting for the Curie temperature shifts to lower temperatures. In addition, larger coercive fields for all in-plane directions are observed in the magnetoresistance signal after the treatment. X-ray absorption spectroscopy evidences the preservation of the electronic d5 state of the Mn atoms after oxygenation. This indicates that the changes in the electrical and consequently in the magnetic properties occur via a hole compensation mechanism promoted by the oxygen species incorporated during the plasma exposure.
Herrera Diez, L., Konuma, M., Kremer, R., Honolka, J., Kern, K., Placidi, E., et al. (2011). Magnetoelectric properties of oxygenated (Ga,Mn)As. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 83(9).
Tipologia: | Articolo su rivista |
Citazione: | Herrera Diez, L., Konuma, M., Kremer, R., Honolka, J., Kern, K., Placidi, E., et al. (2011). Magnetoelectric properties of oxygenated (Ga,Mn)As. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 83(9). |
URL: | http://journals.aps.org/prb/abstract/10.1103/PhysRevB.83.094420 |
IF: | Con Impact Factor ISI |
Lingua: | English |
Settore Scientifico Disciplinare: | Settore FIS/03 - Fisica della Materia |
Revisione (peer review): | Sì, ma tipo non specificato |
Tipo: | Articolo |
Rilevanza: | Rilevanza internazionale |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevB.83.094420 |
Stato di pubblicazione: | Pubblicato |
Data di pubblicazione: | 23-mar-2011 |
Titolo: | Magnetoelectric properties of oxygenated (Ga,Mn)As |
Autori: | |
Autori: | Herrera Diez, L; Konuma, M; Kremer, R; Honolka, J; Kern, K; Placidi, E; Arciprete, F |
Appare nelle tipologie: | 01 - Articolo su rivista |
File in questo prodotto:
File | Descrizione | Tipologia | Licenza | |
---|---|---|---|---|
PRB_83_094420_(2011).pdf | Articolo principale | N/A | Copyright dell'editore | UNIVERSITY_NETWORK Richiedi una copia |