Light scattering spectra of fast relaxation in B2O3 glass

Light scattering spectra of B2O3 glass were measured in the frequency range 20–7000 GHz at temperatures in the range of 15–300 K and are compared with those previously obtained for Ca0.4K0.6(NO3)1.4 (CKN). The low-frequency contribution of the fast relaxation susceptibility spectrum is found to show a power-law behavior with an exponent α=0.6, the latter being temperature independent in contrast to the finding in other inorganic glasses such as silica and CKN. Possible explanations of the spectral shape in B2O3 are considered.