  In the present work, dielectric spectra of mixtures of diethylsulfoxide
(DESO) and water are presented, covering a concentration range of 0.2 - 0.3
molar fraction of DESO. The measurements were performed at frequencies between
1 Hz and 10 MHz and for temperatures between 150 and 300 K. It is shown that
DESO/water mixtures have strong glass-forming abilities. The permittivity
spectra in these mixtures reveal a single relaxation process. It can be
described by the Havriliak-Negami relaxation function and its relaxation times
follow the Vogel-Fulcher-Tammann law, thus showing the typical signatures of
glassy dynamics. The concentration dependence of the relaxation parameters,
like fragility, broadening, and glass temperature, are discussed in detail.
