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  1. 1 Acta Physica Polonica A

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  1. 1 1991

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  1. 1 Cach R.

  2. 1 Haden D.

  3. 1 Mróz J.

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Anomalous Non-linear Dielectric Behaviour of LATGS Crystals

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Cach R., Mróz J., Haden D.
Acta Physica Polonica A
|
1991
|
vol. 79
|
issue 6
905-914
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.
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