Aging and memory effects in β-hydroquinone-clathrate

The out-of-equilibrium low-frequency complex susceptibility of the orientational glass methanol (73%)-β-hydroquinone-clathrate is studied using temperature-stop protocols in aging experiments. Although the material does not have a sharp glass transition, aging effects including rejuvenation and memory are found at low temperatures. They turn out to be much weaker, however, than in conventional magnetic spin glasses.