Abstract
Abstract The behaviour of a ferroelectric in an intensive external electro-magnetic field is discussed. It is shown that, in fields with the amplitude E 0 > 105 V/cm, the phase transition temperature becomes higher, the static permittivity and Curie-Weiss constant increase. The optical absorption coefficient decrease changes to its increase. There is a threshold field, passing by which the system divides into layers of periodical structure of para-and ferroelectric phases. A difference for damping and refraction index was studied, while the field propagation was directed along and against the spontaneous polarization vector.
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