INVESTIGADORES
UREÑA Maria Andrea
artículos
Título:
AgGeSe-Based Bulk Glasses: A Survey of their Fundamental Properties
Autor/es:
MARIA ANDREA UREÑA; FONTANA, M.; PIARRISTEGUY, A.; ARCONDO, B.
Revista:
JOURNAL OF ALLOYS AND COMPOUNDS
Editorial:
ELSEVIER SCIENCE SA
Referencias:
Lugar: Amsterdan; Año: 2010 vol. 495 p. 305 - 308
ISSN:
0925-8388
Resumen:
GexSe1-x
system is a well known glass former for x <0.43. The addition of third
elements (i.e. Ag, Sb, Sn?) even up to high concentrations is possible without
affecting its glass forming ability. These metals confer these glasses very
particular properties. Ag-Ge-Se glasses are semiconductors for low Ag
concentration whereas they are fast ionic conductors above 8 at.% Ag. The
structure, thermal behavior and transport properties of these glasses are
analyzed. Metal doping is easily performed in chalcogenide glasses. It has been
observed that, in contrast to crystalline semiconductors, their transport
properties were not substantially affected as the valence bonds of the doping
elements are completely saturated. The resource of doping with a 57Fe probe is
widely employed in the materials study in order to characterize the short range
order of their structure by means of Mössbauer Effect spectroscopy. These
results are discussed and correlated to the structure and morphology of this
Chalcogenide system.