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Philosophical Magazine Volume 87, 2007 - Issue 3-5: Tenth International Workshop on Disordered Systems, Molveno-Andalo (Trento), Italy, 18–21 March 2006, Guest Editors: A. Fontana, P. Verrocchio and G. Viliani
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Original Articles

Brillouin-scattering study of the fast dynamics of m-toluidine

L. Comez Dipartimento di Fisica, Università di Perugia, Via Pascoli, I-06123 Perugia, Italy; INFM CRS-SOFT, c/o Università di Roma ‘La Sapienza’, P.A. Moro 2, I-00185 Roma, ItalyCorrespondence[email protected]
,
M. Pietrella Dipartimento di Fisica, Università di Perugia, Via Pascoli, I-06123 Perugia, Italy
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D. Fioretto Dipartimento di Fisica, Università di Perugia, Via Pascoli, I-06123 Perugia, Italy; INFM CRS-SOFT, c/o Università di Roma ‘La Sapienza’, P.A. Moro 2, I-00185 Roma, Italy
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G. Monaco European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble Cedex, France
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F. Scarponi Dipartimento di Fisica, Università di Perugia, Via Pascoli, I-06123 Perugia, Italy
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R. Verbeni European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble Cedex, France
&
L. Palmieri Dipartimento di Fisica, Università di Perugia, Via Pascoli, I-06123 Perugia, Italy
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Pages 651-656 | Received 13 May 2006, Accepted 31 Jul 2006, Published online: 05 Apr 2011
 
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Abstract

Brillouin light and X-ray scattering have been used to investigate the dynamic structure factor of supercooled and glassy m-toluidine in the temperature range 34–303 K. In addition to the ubiquitous α-relaxation, evidence is given of a fast relaxation process active in the ns–ps time region. Data on activation energy of the fast process are obtained from the attenuation of longitudinal acoustic modes.

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