Premium
Low‐Frequency Light Scattering in Superionic Glasses (AgI) x (Ag 2 O1B 2 O 3 ) 1− x
Author(s) -
Fontana A.,
Mariotto G.,
Rocca F.
Publication year - 1985
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221290206
Subject(s) - scattering , diffusion , fast ion conductor , ion , condensed matter physics , jump , light scattering , low frequency , range (aeronautics) , materials science , ionic conductivity , chemistry , physics , molecular physics , thermodynamics , optics , quantum mechanics , electrolyte , electrode , astronomy , composite material
Abstract Light scattering measurements are made on superionic glasses (AgI) x (Ag 2 O n B 2 O 3 ) 1− x from 2 to 400 cm −1 and in the temperature range 80 to 400 K. The data show the existence of a strong low frequency scattering which has a Lorentzian shape centered at zero frequency. A model is adopted from disordered crystals which treats such scattering as being due to the jumping of Ag ions. The fitting parameters are related to the probability of jump of the diffusing particles in various sites. An order of magnitude calculation relates the quantities obtained by the model with the completely independent measurements of conductivity and tracer diffusion; satisfactory agreement is found.