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Ferroelectrics Volume 462, 2014 - Issue 1: Proceedings of the Thirteenth International Meeting on Ferroelectricity (IMF-13)
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Section B: CHARACTERIZATION OF SINGLE CRYSTALS

Thermal Treatment and Dielectric Properties of Na0.5Bi0.5TiO3 Single Crystal

T. V. KruzinaOles Honchar Dnipropetrovsk National University, prosp. Gagarina 7249010, Dnipropetrovsk, UkraineCorrespondence[email protected]
,
V. M. SidakOles Honchar Dnipropetrovsk National University, prosp. Gagarina 7249010, Dnipropetrovsk, Ukraine
,
M. P. TrubitsynOles Honchar Dnipropetrovsk National University, prosp. Gagarina 7249010, Dnipropetrovsk, Ukraine
,
S. A. PopovOles Honchar Dnipropetrovsk National University, prosp. Gagarina 7249010, Dnipropetrovsk, Ukraine
&
J. SuchaniczInstitute of Physics, Pedagogical University, Podchorazych 230-84, Krakow, Poland
Pages 140-144 | Received 02 Sep 2013, Accepted 29 Nov 2013, Published online: 29 Apr 2014
 
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Abstract

Dielectric properties of heat treated in air and in vacuum Na0.5Bi0.5TiO3 single crystals are studied. It is shown, that above 350°C ɛ and tanδ exhibit sufficient temperature hysteresis and strongly depend on AC field frequency and heat treatment conditions. Low frequency dielectric dispersion around 400°C and temperature growth of dielectric loss above 500°C are observed in as grown and heat treated in vacuum samples. Frequency dispersion of ɛ and temperature growth of tanδ strongly diminish after annealing in air. It is supposed that slow relaxing dipolar complexes and mobile structural defects are created by oxygen vacancies.

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