INVESTIGADORES
FERRARI Sergio
congresos y reuniones científicas
Título:
Evolution of Quadrupole Hyperfine Interaction while milling a Si-HfO2 blend
Autor/es:
C. Y. CHAIN; SERGIO FERRARI; LAURA CRISTINA DAMONTE; JORGE ALBERTO MARTÍNEZ; A. F. PASQUEVICH
Lugar:
Gijon
Reunión:
Congreso; International Symposium on Metastable, Amorphous and Nanostructured Materials; 2011
Institución organizadora:
University of Oviedo
Resumen:
devices, a refined
knowledge of the possible solid state reactions between Si and HfO2 is
valuable. Being the
Perturbed Angular
Correlation technique a very sensitive method to detect small changes in solid
state, the
goal of this work is
to follow the different stages that occur while ball milling a blend Si-HfO2 by
inspecting
the hyperfine
quadrupole interaction at Hf sites. The characterization is complemented by
X-ray diffraction
analysis. For
comparison, a similar study on pure m-HfO2 is
carried out. The results seem to reveal a gradual
incorporation of Si
in a tetragonal defective phase of hafnia with milling time. In addition, the
formation of
precursor arrays of
the HfSiO4 structure takes place. After an annealing at 1000ºC important
amount of
crystalline hafnon
appear.