The thermal conductivity of polyamorphous state of solid monohydroxyl alcohols

• Published in: Физика низких температур
• Date: 2012
• Main Authors: Krivchikov, A.I., Korolyuk, O.A., Sharapova, I.V.
• Format: Article
• Language: English
• Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2012
• Subjects: Квантовые эффекты в полупpоводниках и диэлектриках
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/116829
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: The thermal conductivity of polyamorphous state
 of solid monohydroxyl alcohols / A.I. Krivchikov, O.A. Korolyuk, I.V. Sharapova // Физика низких температур. — 2012. — Т. 38, № 1. — С. 95-101. — Бібліогр.: 39 назв. — англ.

New measurement results on the thermal conductivity of solid ethyl alcohol С₂Н₅ОН in the interval from 2 K
 to the melting temperature are presented. The annealing effect in the thermal conductivity of the orientationally
 ordered phase of the alcohol has been observed in a wide range of temperatures. This phase was obtained as a result
 of the irreversible first-order phase transition from an orientationally disordered crystal of cubic structure at
 T = 109 K. The thermal conductivity was observed to increase as the monoclinic lattice changed from a less stable
 phase to a more stable one. The growth may be due to the improved quality of the completely ordered crystal.
 A comparative analysis of the temperature dependences of thermal conductivity κ(T) was performed for solid
 monohydroxyl alcohols CH₃OH, С₂Н₅ОН, С₂D₅ОD, C₃H₇OH and C₄H₉OH in the disordered orientational and
 structural states. At low temperatures the thermal conductivity of a series of monohydroxyl structural glasses of
 alcohols increases with the mass of the alcohol molecule by a linear dependence.