Nano Archive

On Dielectric Permittivity Dispersion in Ferroelectric Triglycine Sulfate (TGS) in Wide Temperature Range.

V.Ê., Gavrilova N.D.Lotonov A.M. Novik (2006) On Dielectric Permittivity Dispersion in Ferroelectric Triglycine Sulfate (TGS) in Wide Temperature Range. Journal of NANO and MICROSYSTEM TECHNIQUE, 2 (2). pp. 14-21.

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Abstract

The results of research of a dielectric dispersion in ferroelectric Triglycine Sulfate (Curie point Tc = 49,15°C) in frequency range 10-3…107 Hz at — 155…90°C are stated. In paraelectric phase there is no dispersion or it is extremely flat. In close vicinity to the transition region (Tc + 0,3°C) appearance of a dispersion was observed, while the classical form of the latter is formed only at T= Tc. The appeared domain structure is considered to be the dominating reason of the dispersion. In high-frequency range its contribution is connected with oscillations of a domain wall, in low-frequency range — also with the formation of new domains, i. e. with reversed polarization processes in small fields. At ultra low frequencies the contribution of the own electric conductivity to the dispersion is noted, that especially increase in paraelectric phase and in the Curie point. At T= Tc at frequencies less than 10-1 Hz formation of a closing layer was observed, that lowers measured value of a dielectric permittivity of the sample by two orders of magnitude.

Item Type:Article
ID Code:2041
Deposited By:Prof. Alexey Ivanov
Deposited On:19 Dec 2008 13:21
Last Modified:20 Mar 2009 08:58

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