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Título: | Thermal conductivity of glassy primary mono-hydroxylalcohols. |
Autor: | Krivchikov, A.I.; Korolyuk, O.A.; Sharapova, I.V.; Romantsova, O.O.; Bermejo, Francisco Javier CSIC ORCID; Cabrillo García, Carlos CSIC ORCID; Fernández-Perea, Ricardo CSIC ORCID; Bustinduy, Ibón CSIC ORCID | Fecha de publicación: | 2011 | Editor: | Elsevier | Citación: | Journal of Non-Crystalline Solids 357: 483- 486 (2011) | Resumen: | Thermalconductivity 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. | URI: | http://hdl.handle.net/10261/59761 | DOI: | 10.1016/j.jnoncrysol.2010.06.046 | Identificadores: | doi: 10.1016/j.jnoncrysol.2010.06.046 issn: 0022-3093 |
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