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Ferroelectrics Volume 303, 2004 - Issue 1
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Original Articles

Study of the Ferroelastic Phase Transition in n-Icosane/Urea Compound by DMA and Brillouin Scattering

L. RUBIO-PEÑA Dpto. de Física Aplicada II Facultad de Ciencias, UPV/EHU, Apdo. 644, 48080, Bilbao, Spain
,
S. MIELCAREK Faculty of Physics Adam Mickiewicz University Umultowska, 85, 61-614, Poznan, Poland
,
T. BRECZEWSKI Dpto. de Física Aplicada II Facultad de Ciencias, UPV/EHU, Apdo. 644, 48080, Bilbao, Spain
,
B. MRÓZ Faculty of Physics Adam Mickiewicz University Umultowska, 85, 61-614, Poznan, Poland
&
E. H. BOCANEGRA Dpto. de Física Aplicada II Facultad de Ciencias, UPV/EHU, Apdo. 644, 48080, Bilbao, Spain
Pages 163-166 | Received 01 Aug 2003, Accepted 01 Jan 2004, Published online: 08 Sep 2010
 
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Abstract

The existence of the ferroelastic phase transition at T c = 191 K in n-icosane/urea single crystal has been confirmed. Brillouin scattering spectroscopy has been performed, and the room temperature elastic constant have been determined. The excitations which probably correspond to an existence of a sliding mode (phason) and/or reorientational motions of the n-icosane guest chains have been detected.

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