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.
@article{arxiv.1411.3109,
title = {Low temperature dielectric relaxation study of aqueous solutions of diethylsulfoxide},
author = {L. Gabrielyan and S. Markarian and P. Lunkenheimer and A. Loidl},
journal= {arXiv preprint arXiv:1411.3109},
year = {2014}
}