V. V. Kochervinskii, A. S. Pavlov, N. V. Kozlovaa, and N. A. Shmakova
Karpov Institute of Physical Chemistry, ul. Vorontsovo Pole 10, Moscow, 105064 Russia
e-mail: KochVal@nifhi.ru
Received January 16, 2014;
Revised Manuscript Received April 5, 2014
Abstract—The polarization of oriented films of the ferroelectric copolymer of vinylidene fluoride and tetraflu-
oroethylene in a sinusoidal electric field is studied. In low fields, the copolymer behaves as a linear dielectric
whose permittivity nonlinearly increases with the amplitude of the alternating field. This behavior is related to
the preferential orientation of the dipole moment of the chain along the normal to the surface and to the monoc-
rystal-structure formation. In higher fields, the hysteresis behaves formally coincidently with the behavior of an
antiferroelectric. The important role of through stressed chains in the amorphous phase in the initiation of
domains of a new direction in polar crystals is observed. Increased adsorption of water molecules on the surface
of a polarized film is found and is attributed to the formation of the final density of the stable polarization charge
on it.
DOI: 10.1134/S0965545X14050101
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