Calorimetric Measurements at Low Temperatures in Toluene Glass and Crystal

• DOI: 10.1007/s10909-017-1760-8
• Publication Date: 2017-02-23T10:50:52Z
• Authors: C. Alvarez-Ney; J. Labarga; M. Moratalla; J. M. Castilla; M. A. Ramos
• Keywords: 0301 basic medicine; Condensed Matter - Materials Science; 03 medical and health sciences; 0103 physical sciences; Materials Science (cond-mat.mtrl-sci); FOS: Physical sciences; Disordered Systems and Neural Networks (cond-mat.dis-nn); Condensed Matter - Disordered Systems and Neural Networks; 01 natural sciences

12 pages, 6 figures. Work presented at the 11th International Conference on Cryocrystals and Quantum Crystals (Turku, Finland), 18-24 August 2016<br/>The specific heat of toluene in glass and crystal states, has been measured both at low temperatures down to 1.8 K (using the thermal relaxation method) and in a wide temperature range up to the liquid state (using a quasiadiabatic continuous method). Our measurements therefore extend earlier published data to much lower temperatures, thereby allowing to explore the low temperature glassy anomalies in the case of toluene. Surprisingly, no indication of the existence of tunneling states is found, at least within the temperature range studied. At moderate temperatures, our data either for the glass or for the crystal show good agreement with those found in the literature. Also, we have been able to prepare bulk samples of toluene glass by only doping with 2% mol ethanol instead of with higher impurity doses used by other authors.<br/>