Long time dependence of complex dielectric permittivity in triglycine–zinc chloride crystal below room temperature

Author: Tylczyński Zbigniew   Wiesner Maciej  

Publisher: Taylor & Francis Ltd

ISSN: 0141-1594

Source: Phase Transitions: A Multinational Journal, Vol.86, Iss.2-3, 2013-02, pp. : 275-283

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Abstract

Temperature changes in the components of complex dielectric tensor were studied in triglycine–zinc chloride crystal in the range 80–300 K. The real part of permittivity in the [001] direction shows a big jump at 234 K. The imaginary part of all dielectric components has small dispersion above this temperature. Possible phase transition in triglycine–zinc chloride crystal has been discussed. Results of measurements performed in isothermal conditions at 82 K reveal a slow rise in permittivity to its initial value measured above 234 K. This process depends on the frequency of measuring field. The JMA analysis is applied to determine the Avrami parameter.