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Autori: Constantin Roşu, Gabriela Iacobescu, Cornelia Moţoc, Carmen Topalã
Editorial: Modern Physics Letters B, Vol.20, No. 13, p.777-785, 2006.
The phase transitions in cholesteryl-beta-chloropropionate were studied by using termally stimulated depolarization current (TSDC) methods. Optical transmission studies were performed over the whole temperature range. From the experimental data, useful informations with referrence on the conduction mechanism were obtained. The TSDC spectra displayed a peak at the solid-cholesteric phase transition temperature. Using the plots obtained when different depolarization fields were applied, the activation energies and the relaxation time were determined.
Cuvinte cheie: curenţi depolarizaţi stimulaţi termic, cristale lichide colesterice, energii de activare // thermally stimulated depolarization currents, cholesteric liquid crystals, activation energies