ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
The recently observed possibility to suppress the β-relaxation intensity of o-terphenyl by annealing at temperatures below the glass transition guided us to ask, whether the absence of a dielectric β process in many glass-forming materials, e.g., salol (phenyl salicylate), is a matter of the slow cooling rates usually employed to enter the glassy state. In order to assess this issue, we have quenched liquid salol to well below Tg at a rate of dT/dt=−490 K/min. Opposed to the case of cooling rates around −5 K/min or slower, this highly quenched sample displays a symmetric dielectric relaxation peak near f=103 Hz with an appreciable relaxation strength, Δε=6×10−3. This novel feature of salol disappears irreversibly after a temperature excursion towards the glass transition at Tg=220 K. © 1999 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.479105
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