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Proceedings Paper

Polarization fluctuations in an epoxy system above and below the glass transition
Author(s): M. Lucchesi; D. Prevosto; A. Dominjon; S. Capaccioli; P. A. Rolla
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Paper Abstract

We investigated the validity of the fluctuation dissipation theorem in the structural glass former triphenylolmethane triglycidyl ether. Polarization relaxation measurements were compared to the thermal fluctuation of the polarization. We observed that above the glass transition temperature, the fluctuation dissipation theorem is fully verified, whereas below the glass transition temperature the power noise spectrum measured subsequently to a temperature quench is more intense than that expected from response measurements. The amplitude of the fluctuation is distributed according to a non Gaussian distribution, whose origin is not strictly related to the presence of intense noise pulses.

Paper Details

Date Published: 22 June 2007
PDF: 9 pages
Proc. SPIE 6600, Noise and Fluctuations in Circuits, Devices, and Materials, 66000P (22 June 2007); doi: 10.1117/12.724677
Show Author Affiliations
M. Lucchesi, Univ. degli Studi di Pisa (Italy)
CNR-INFM polyLab Pisa (Italy)
D. Prevosto, Univ. degli Studi di Pisa (Italy)
CNR-INFM polyLab Pisa (Italy)
A. Dominjon, Univ. degli Studi di Pisa (Italy)
Univ. de Savoie (France)
S. Capaccioli, INFM-CNR SOFT, Roma (Italy)
Univ. di Pisa (Italy)
P. A. Rolla, Univ. degli Studi di Pisa (Italy)
CNR-INFM polyLab, Pisa (Italy)


Published in SPIE Proceedings Vol. 6600:
Noise and Fluctuations in Circuits, Devices, and Materials
Massimo Macucci; Lode K.J. Vandamme; Carmine Ciofi; Michael B. Weissman, Editor(s)

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