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Titolo:
LOW-ENERGY VIBRATIONS IN SUPERIONIC GLASSES
Autore:
BARTOLOTTA A; CARINI G; DANGELO G; TRIPODO G;
Indirizzi:
UNIV MESSINA,DIPARTIMENTO FIS,CONTRADA PAPARDO,SALITA SPERONE 31 I-98166 SANT AGATA ME ITALY UNIV MESSINA,IST NAZL FIS MAT I-98166 SANT AGATA ME ITALY CNR,IST TECN SPECT I-98166 SANT AGATA ME ITALY
Titolo Testata:
Solid state ionics
fascicolo: 1-4, volume: 105, anno: 1998,
pagine: 97 - 102
SICI:
0167-2738(1998)105:1-4<97:LVISG>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
BORATE GLASSES; ACOUSTIC PROPERTIES; NEUTRON-SCATTERING; VITREOUS SILICA; FREQUENCY; EXCITATIONS; DYNAMICS; RAMAN; BEHAVIOR; SYSTEMS;
Keywords:
SUPERIONIC GLASSES; SPECIFIC HEAT; RAMAN SCATTERING; BORATE GLASSES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
28
Recensione:
Indirizzi per estratti:
Citazione:
A. Bartolotta et al., "LOW-ENERGY VIBRATIONS IN SUPERIONIC GLASSES", Solid state ionics, 105(1-4), 1998, pp. 97-102

Abstract

Measurements of low temperature specific heat C-p (1.5 K-25 K) have been carried out in AgI-Ag2O-B2O3 superionic glasses. It has been revealed that modifications of the network coherence change the magnitude of the hump in the specific heat, which is observed when it is plotted as C-p/T-3: the increasing connectivity (defined as the number of bridging bonds per network forming ion) reduces the deviations of C-p froma T-3 behavior. Finally comparative measurements of low temperature C-p and low frequency Raman scattering (below 100 cm(-1)) in the same glass permit us to assess the frequency dependence of the photon-vibration coupling coefficient C(omega) and the spectral density of low-energy vibrational modes g(omega).

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Documento generato il 25/11/20 alle ore 09:04:44