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Thermal conductivity of glassy primary mono-hydroxylalcohols.

AuthorsKrivchikov, A. I.; Korolyuk, O. A.; Sharapova, I.V.; Romantsova, O.O.; Bermejo, Francisco Javier ; Cabrillo García, Carlos ; Fernández-Perea, Ricardo ; Bustinduy, Ibón
Issue Date2011
CitationJournal of Non-Crystalline Solids 357: 483- 486 (2011)
AbstractThermalconductivity κ(T) data for homologous series of primarymono-hydric alcohols – methanol, ethanol, 1-propanol, 1-butanol – within their molecular glass states are analyzed within the temperature region stretching from 2 K up to the glass transition Tg. Below 7 K κ(T) increases with the number of carbon atoms in the molecule. Furthermore, its temperature dependence exhibits a behavior akin to that predicted by the phenomenological model of soft potentials (SPM). The data are then rationalized in terms of the SPM parameters such as characteristic energy W and the parameter ¯С which measures the strength of the coupling of acoustic modes with two-level systems. The dependence of such parameters upon the molecular mass of the alcohol seems to agree with the SPM predictions. The parameters ¯С and W were used to calculate the boson peak energies. The values obtained agree well with literature data.
Identifiersdoi: 10.1016/j.jnoncrysol.2010.06.046
issn: 0022-3093
Appears in Collections:(CFMAC-IEM) Artículos
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