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Estimation of essential dielectric parameters in ferroelectric state of TGS crystal

H. V. ALEXANDRU1,2, C. MINDRU1, R. BACŞEI1, C.-P. GANEA3,*

Affiliation

  1. Faculty of Physics, University of Bucharest, Romania
  2. Academy of Romanian Scientists, 54 Splaiul Independentei, RO-050094, Bucharest, Romania
  3. National Institute of Materials Phyisics, Bucharest-Magurele, Romania

Abstract

The ferroelectric parameters of pure TGS crystal were estimated using the frequency dependence of permittivity components and approximate related Debye equations. The experimental components of permittivity were presented on semi-log frequency dependence on seven orders of magnitude in the ferroelectric range (43 oC). The three relaxation maxima of the imaginary components of permittivity allowed estimating the related values of the real components and of the three associated relaxation times. The extreme values of the real component of permittivity on the abscissa scale and the associated relaxation times were estimated according to the approximated Debye equations. The calculated values of the radius and  parameters of arcs Cole-Cole scarcely agree with the values estimated from the direct experimental (” vs. ’) analysis..

Keywords

Ferroelectric crystals, Triglycine sulphate, Dielectric spectroscopy, Permittivity relaxation.

Submitted at: Feb. 12, 2014
Accepted at: March 13, 2014

Citation

H. V. ALEXANDRU, C. MINDRU, R. BACŞEI, C.-P. GANEA, Estimation of essential dielectric parameters in ferroelectric state of TGS crystal, Journal of Optoelectronics and Advanced Materials Vol. 16, Iss. 3-4, pp. 457-462 (2014)