Data di Pubblicazione:
2008
Citazione:
Optical and spectroscopic characterisation of permanently densified GeO 2 glasses / L. Orsingher, M. Calicchio, G. Carini, R. Dal Maschio, D. Fioretto, A. Fontana, P. Fumagalli, E. Gilioli, M. Mattarelli, E. Moser, F. Rossi. - In: PHILOSOPHICAL MAGAZINE. - ISSN 1478-6435. - 88:33-35(2008), pp. 3907-3914.
Abstract:
Optical and spectroscopic characterization was carried out on densified vitreous
germania glasses retrieved from pressures in the range 2–6 GPa. The density of the
obtained glasses increased with applied pressure. Ultrasonic and Brillouin
measurements revealed an increase of the longitudinal and shear sound velocity,
in agreement with the hardening of the elastic medium. Raman measurements
allowed the structural modification of the system to be studied as a function of its
density and showed the evolution of the boson peak, which shifts towards higher
frequencies and decreases in intensity.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
L. Orsingher, M. Calicchio, G. Carini, R. Dal Maschio, D. Fioretto, A. Fontana, P. Fumagalli, E. Gilioli, M. Mattarelli, E. Moser, F. Rossi
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