# Light scattering results in agi based superionic glasses

Benassi, P. and Fontana, A. and Rodrigues, P.A.M. Light scattering results in agi based superionic glasses. Accademia Peloritana dei Pericolanti Classe FF.MM.NN., 69. pp. 279-292.

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Brillouin and Raman scattering measurements have been performed on the superionic conductor $(AgI)_x$ $(AgPO3)_1_X$ in the fuli glass forming region $(0 < x < 0.55)$ from 18 to 330 K. For the first time in kind of solid state samples we have been able to cover the full spectral range $(0.2-350 cm^-^1$ frequency shilft) by using the same spectrometer. By increasing the $AgI$ content, the behavior of Brillouin and Raman intensities together with the Raman spectral shape suggests the hypothesis that the Raman scattering of such glasses cnn be reconstructed by the sum of the pure $\alpha-AgI$ and $AgPO3$ spectra and therefore it may be argued that the dynamics of the two pure component are weakly interacting. Further we have been able to separate the quasi-elastic component from the one-phonon disorder induced density of states [1] by using their different temperature behaviour. We have compared the obtained data to the most likely mechanisms that could accont for the quasi-elastic scattering in our sample: diffusion of $Ag^+$ ions, two level states in glasses and two phonon scattering.