INFIQC   05475
INSTITUTO DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Synthesis and characterization of thin films of Zn-Mn-Al-O system obtained by PLD
Autor/es:
M. G. FURLANI; C. I. ZANDALAZINI; C. I. VIÑA; M. I. OLIVA
Lugar:
Buenos Aires
Reunión:
Congreso; At the Frontiers of Condensed Matter V; 2010
Resumen:
Among semiconductor II-IV compounds, oxide zinc
(ZnO) is one of the most promising for technological
applications for its optical, electrical, piezoelectric and
magnetic properties. In particular ZnO films exhibit
unique properties that are appropriate for devices and
magnet-optics applications. Incorporating aluminum
and manganese allows obtaining a material known as
diluted magnetic semiconductor (DMS) that contin-
ues showing a high bandwidth prohibited, retains its
transparency in the visible range and is able to gener-
ate a magnetic order at room temperature. Starting
from precursors ZnO, MnO2 and Al2O3 , by conven-
tional ceramic method were obtained powders, ZnO +
3% wt. of Al, + 2% ZnO at. Mn, + 2% ZnO at. Mn
+3% wt. of Al, and ZnO + 5% at. Mn + 3% wt of
Al. These materials cold pressed to make the targets
employees in pulsed laser deposition (LDP). (Deposits
were made using a Nd-YAG (532 nm) laser in atmo-
sphere oxygen on a substrate (SI 100) / SiO2/nitride)
at 450 oC. The structural properties-obtained by DRX
- and magnetic properties of powders and films were
compared. Also the films were characterized surface
and morphologically; determining presence of oxide of
zinc and other oxides of Mn in powders samples. Also
Zn oxide is detected in all films. Contrary to expecta-
tions, ferromagnetic ordering has not been detected,
in films at room temperature.