Extrinsic permittivity in domain engineered rhombohedral BaTiO.sub.3./sub. monocrystal

0498313 - FZÚ 2019 CZ eng A - Abstract
Bednyakov, Petr - Savinov, Maxim - Pokorný, Jan - Hlinka, Jiří (ed.)
Extrinsic permittivity in domain engineered rhombohedral BaTiO₃ monocrystal.
Book of abstracts - XXIII Czech-Polish seminar - Structural and ferroelectric phase transitions. Praha: Fyzikální ústav AV ČR, v. v. i., 2018 - (Hlinka, J.; Pokorný, J.; Bubnov, A.). s. 25-25. ISBN 978-80-905962-7-6.
[XXIII Czech-Polish Seminar Structural and ferroelectric phase transitions. 21.05.2018-25.05.2018, Kouty]
Grant - others:AV ČR(CZ) PAN-17-04
Program: Bilaterální spolupráce
Institutional support: RVO:68378271
Keywords : poling * rhombohedral phase * barium titanate * domain walls
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)

Unusual increase of dielectric permittivity of a BaTiO3 single crystal in rhombohedral phase has been a subject of substantial interest. Domain structure of the 111pc-oriented single crystal plates of BaTiO3 has been modified by combinations of in-plane and out-of-plane steady state electric poling at ambient temperature. It has been found that the annealed, in-plane and out-of-plane poled samples showed markedly different dielectric properties at low temperatures. The difference in low-termperature permittivity behavior is enhanced by the out-of-plane fast-decayed bipolar electric pulse treatment even though there is no clear signature of it by optical domain structure observations. Our findings suggest that a fast-decayed bipolar electric pulse applied to an annealed crystal can enhance the density of 180-degree domain walls which remain in rhombohedral phase.
Permanent Link: http://hdl.handle.net/11104/0291923