2024-03-28T21:29:58Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1405552021-10-29T10:35:04Zcom_10261_135com_10261_4col_10261_388
2016-11-22T11:52:07Z
urn:hdl:10261/140555
Relaxational dynamics in the glassy, supercooled liquid, and orientationally disordered crystal phases of a polymorphic molecular material
Jiménez-Ruiz, M.
González, M. A.
Bermejo, Francisco Javier
Miller, M. A.
Birge, N.O.
Cendoya, I.
Alegría, A.
Dirección General de Investigación Científica y Técnica, DGICT (España)
12 págs.; 12 figs.
The relaxational dynamics of the ambient pressure phases of ethyl alcohol are studied by means of measurements of frequency dependent dielectric susceptibility. A comparison of the a relaxation in the supercooled liquid and in the rotator phase crystal indicates that the molecular rotational degrees of freedom are the dominant contribution to structural relaxation at temperatures near the glass transition, the flow processes having lesser importance. Below the glass transition a secondary β relaxation is resolved for the orientational and structural glasses. Computer molecular-dynamics results suggest that localized molecular librations, strongly coupled to the low-frequency internal molecular motions, are responsible for this secondary relaxation. ©1999 The American Physical Society.
2016-11-22T11:52:07Z
2016-11-22T11:52:07Z
1999-04-01
2016-11-22T11:52:08Z
artículo
Physical Review B 59: 9155- 9166 (1999)
http://hdl.handle.net/10261/140555
10.1103/PhysRevB.59.9155
http://dx.doi.org/10.13039/501100008737
eng
Publisher's version
https://doi.org/10.1103/PhysRevB.59.9155
Sí
openAccess
American Physical Society