Anomalous Non-linear Dielectric Behaviour of LATGS Crystals

• Authors: R. Cach , J. Mróz , D. Haden
• Languages of publication: EN

Abstracts

EN

The dielectric permittivity in a biasing electric field and also the spontaneous polarization of LATGS crystals are measured near the ferroelectric phase transition. It is demonstrated that L-alanine admixtures change the parameters of dielectric state equation. It is shown that the bias field value decreases while approaching the phase transition temperature from the para-electric phase. The effective non-linearity coefficient B, near Tc, depends on electric field direction. This anomalous non-linear behaviour can be explained assuming asymmetric bias field dependence on external electric field.

Keywords

EN

77.80.Bh; 77.20.+y

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1991
• Volume: 79
• Issue: 6
• Pages: 905-914

Dates

published

1991-06

received

1991-02-19

Contributors

author

R. Cach

• Institute of Experimental Physics, University of Wrocław, Cybulskiego 36, 50-205 Wrocław, Poland

author

J. Mróz

• Institute of Physics, Technical University of Wrocław, Wybrzeże S. Wyspiańskiego 27, 50-317 Wrocław, Poland

author

D. Haden

• Institute of Experimental Physics, University of Wrocław, Cybulskiego 36, 50-205 Wrocław, Poland