Ferroelectric Phase Transitions in the BIMEVOX Solid Solutions

E. D. Politova Karpov Institute of Physical Chemistry, Vorontsovo pole, 10, 105064, Moscow, Russia

E. A. Fortalnova Karpov Institute of Physical Chemistry, Vorontsovo pole, 10, 105064, Moscow, Russia; Peoples' Friendship University of Russia, Ordzhonikidze st., 3, 117198, Moscow, Russia

G. M. Kaleva Karpov Institute of Physical Chemistry, Vorontsovo pole, 10, 105064, Moscow, Russia

S. Yu. Stefanovich Karpov Institute of Physical Chemistry, Vorontsovo pole, 10, 105064, Moscow, Russia

V. V. Murasheva Peoples' Friendship University of Russia, Ordzhonikidze st., 3, 117198, Moscow, Russia

M. G. Safronenko Peoples' Friendship University of Russia, Ordzhonikidze st., 3, 117198, Moscow, Russia

N. U. Venskovskii Peoples' Friendship University of Russia, Ordzhonikidze st., 3, 117198, Moscow, Russia

P. B. Loginov Moscow State Institute of Electronic Technology, 124498, Zelenograd, Moscow, Russia

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Abstract

Ceramic solid solutions Bi₄(V_{1 − x}Me_x)₂O_{11 − y} with x = 0 ÷ 0.3, Me = Zr, Ga, Fe were prepared by the solid state reactions and were studied by the DTA/DSC, X-ray diffraction, dielectric spectroscopy and the second harmonic generation (SGH) method. The temperature dependences of the SHG signal confirmed the noncentosymmetric structure of the samples with x ≤ 0.05 at room temperature. Similar features were observed in the SHG and dielectric property measurements, which give an indication of the strong domain walls “pinning” by oxygen vacancies inherent to the Bi₄(V_{1 − x}Me_x)₂O_{11 − y} structures.

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77.84.-s

Acknowledgment

The financial support by the Russian Foundation for Basic Research (grant 07-03-00133) is acknowledged.

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Ferroelectric Phase Transitions in the BIMEVOX Solid Solutions

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Ferroelectric Phase Transitions in the BIMEVOX Solid Solutions

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